isotopess! help pleasee 20pts
Answer:
For lithium -6
Proton neutron and electron are
3, 3, 3
For lithium -7
It is 3, 4, 3
Explanation:
Proton is atomic number
Neutron is mass num - atomic num
Electron is the same number with proton
What charge would an ion have if it had more electrons than protons?
A. It would have a net positive charge.
OB. It would have no charge.
C. It would have a net negative charge.
Ο Ο
D. It would be neutral, since electrons would be outside the nucleus.
Answer:
it will have a net negative charge and it is known as anion
What will happen when we replace oxygen with nitrogen in our life while breathing and what will happen if it was in our cells? (Theory no one has ever thought)
ce cantitate se solutie NaOH de cantitate 0.2 M reactioneaza total cu 300g fenol de puritate 90%?
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An atom has 7 protons, 8 electrons, and 7 neutrons. What is the charge of the
atom and what type of ion is it?
Answer: An atom containing 7 protons, 8 neutrons, and 7 electrons is charge-neutral.
Explanation:
An atom is composed of protons (positively charged), neutrons (no charge) and electrons (negatively charged). The excess or defect of electrons in relation to protons determines the charge of an atom.
The atom described is an anion with -1 charge as it has one extra electron than protons.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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how many electrons must beryllium gain or lose to form stable ions
Explanation:
beryllium must loss 2 electrons to form a stable octet to its nearest noble gas Helium.
It can loss electron because it is a metal and is placed in 2group and 2 period in group of alkaline earth metals.
hope this helps you to.
Mrs. Sprague wants to determine which type of ball has the highest bounce. she
drops a tennis ball, soccer ball, then a basketball from a height of 15 feet, and
measures and records how high each type of ball bounces back up.
What is the Independent Variable in this experiment?
A.the different types of balls being tested
B.the height of the drop
C.the height of each bounce
D.the measuring tape
PLEASE HELP
Answer:
Explanation:
It's going to be the height of the drop. That is kept as a constant. The dependent variable is how high each ball bounces.
what would happen to dietary protein if hcl were not being produced in sufficient quantities?
Dietary protein will not be digested if Hcl were not being produced in sufficient quantities.
In the stomach, there are some glands found on the stomach lining that helps to release hydrochloric acid (HCl). Their major role is to dissolve food and produce an acidic medium.
The acidic media promotes and improves the conversion of pepsinogen to pepsin. Pepsin acts as an enzyme that supports protein digestion.
Protein digestion requires a pH of around 1.8 which can be achieved by the secretion of HCl.
As a result, if HCI is not released in the stomach in sufficient quantities, pepsin will not be activated and it would have a detrimental impact on protein digestion.
Therefore, we can conclude that dietary protein will not be digested if Hcl were not being produced in sufficient quantities.
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3. How many moles of silver is 8.46x1024 atoms of
silver?
Answer:
14.05 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{8.46 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 14.053156[/tex]
We have the final answer as
14.05 molesHope this helps you
Someone pls help me I will make you you brain
Answer:
I and II
Explanation:
Read the article by Michael Fumento, writer for the New York Post editorial blog, who does not support global warming.
Back in 2005 I and others reviewed the entire hurricane record, which goes back over a century, and found no increase of any kind. Yes, we sometimes get bad storms—but no frequently now than in the past. The advocates simply ignored that evidence.
Fact is, the earth was cooling and warming long before greenhouse gases could have been a factor. The [global warming supporters] have been proved wrong time and time again.
Which best describes the reliability of the source?
Nationally certified organizations are considered an unreliable source because the public can access their information.
Charities are considered a reliable source because the public makes financial contributions to them.
Editorial blogs are considered an unreliable source because the author may not have a science background.
Editorial blogs are considered a reliable source because authors contribute to them regularly.
The editorial blogs are considered an unreliable source because the author may not have a science background. Option C
What the reliability of a source?We know that not all sources of information could be taken to be reliable. A source of information could come across as being reliable when the source is an authority in the area in which the information is furnished.
Such authorities often publish authentic and verified information in reputable journal that are meant for professional consumption.
Thus, the editorial blogs are considered an unreliable source because the author may not have a science background.
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The colour observed hrainbow during on the lower side of a a sunny rainy day is
Answer:
..
Explanation:
which element has a larger atomic radius than sulfur?
Someone pls help me with this I will make you brain
Answer:
The answer should be primary pollutants from a stationary source.
Explanation:
Primary pollutants are emitted directly from a source and do not change in the atmosphere, and from a stationary source because manufacturing factories have a fixed location.
Hope this helped :D
The atomic number of oxygen is 8. The mass number of an atom of oxygen is 17. Describe the number and type of particles in the nucleus of this atom.
Answer:
protons: 8
neutrons: 9
Explanation:
the atomic number tells you how many protons are in a element. The mass is the number of protons + neutrons.
17 - 8 = 9 neutrons
There are 8 protons and 9 neutrons in the nucleus of the oxygen atom.
What is the atomic number and mass number of an atom?The atomic number of an atom is the number of protons in atom of an element.
It can also be defined as the number of electrons in a neutral atom of an element.
The mass number is the number of protons and neutrons in the nucleus of an atom of an element.
The proton number of the oxygen atom is 8
The neutron number is 17 - 8 = 9
Therefore, in the nucleus of the oxygen atom, there are 8 protons and 9 neutrons.
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Select the correct answer from the drop-down menu.
Example The anticancer druge cir-platin hydrolysis in with constant 1. Solo - at pH 7:0 and 25°c. calculate the half life of the reaction
Answer:
ganda no beeeeeèeeeeee
Someone pls help me I will mark you as brain
Answer:
Chlorination
Explanation:
"Exposure to high volumes of chlorine gas fumes can cause serious health problems, including death."
https://water.mecc.edu/courses/ENV211/lesson14_print.htm
:)
Neon consists of three isotopes: Neon-20 with a mass of 19.992 amu and an abundance of 90.48%, Neon-21with a mass of 20.994 amu and an abundance of 0.27%, and Neon-22 with a mass of 21.991 amu and an abundance of 9.25%. Determine the average atomic mass of Neon:
7. How do the test variables (independent variables) and outcome variables (dependent variables) in an
experiment compare?
The test variable (independent variable) and outcome variable (dependent variable) have no affect
BL A. on each other.
The test variable (independent variable) controls the outcome variable (dependent variable).
BB
The outcome variable (dependent variable) controls the test variable (independent variable).
B.C.
The test variables (independent variables) and outcome variables (dependent variables) are the same
Bi D. things
Answer:
The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.
Explanation:
Hope this helps...
2+2+2 plssssssssssssssssssssssssss
Answer:
6
Explanation:
2+2+2=6 :)
Answer:
6
Explanation:
vvvffhjh DC hcf vhcnbfhbc
Someone pls help me I will make you brain
Answer:
111
16464616944664kxkxlndkkndndnfnnfnfnnfnfQuestion 2 Which models of the atom from task 1 are not supported by Rutherford’s experimental evidence? For each of these models, explain the experimental results that the model would predict.
Answer:
Sorry I don't know.
Explanation:
I'm only in middle school.
1. What are the 5 characteristics a substance must have in order to be a mineral
Answer:
A mineral has to be naturally occurring, inorganic, solid, have a crystal structure, and have a definite chemical composition.
Explanation:
what do you think life on earth will be like if chemistry had not been put to practical use
Explanation:
Archaism
Things on Earth would be unexplainable
3. A sample of carbon has a mass of
0.000000000000000-0034 kg. Express
this mass in scientific notation.
[tex] - 34 {}^{15} [/tex]
The power of -34 will be 15 because 15 zeroes are given....new substances are formed in a chemical reaction as a result of
Answer:
New substances formed when breaking of bonds take place and new bonds get formed which results in formation of new products. That breaking of bond is a chemical change because in such a process composition of substance gets changed and forms a new substance.
In 6CH4, we have 6 molecules of CH4. What is the 6 called?
Answer:
The coeffeceient
Explanation:
Which phrase describes transmutation?(1 point)
the conversion of an atom of one element into a different element through nuclear changes
the conversion of energy to matter through chemical changes
the conversion of protons to neutrons through nuclear changes
the conversion of one substance to another through chemical changes
Help plss quick
thx
The phrase that describes transmutation is ; ( A ) The conversion of an atom of one element into different element through nuclear changes.
Transmutation is simply the change of an element to another element, transmutation occurs at the nucleus of the atom of an element and this process is initiated through nuclear reaction ( radioactive decay ).
Therefore the conversion of an atom of one element into different element through nuclear changes summarizes the term "transmutation".
Hence we can conclude that the phrase that describes transmutation is the conversion of an atom of one element into different element through nuclear changes.
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Answer:
Unit 4 Lesson 2:
Energy Release Quick Check
1. 138
2. The conversion of an atom of one element into a different element through nuclear changes.
3. A nuclear equation is balanced according to mass number. A chemical equation is balanced according to the total mass before and after the change.
4. 82
5. Some of the matter is converted to energy.
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Chemistry
How does the difference in size of particles affect the rate of diffusion?
Explanation:
Heavier particles will move more slowly and so will have a slower rate of diffusion. Smaller particles on the other hand will diffuse faster because they can move faster.
Explanation:
smaller particles diffuse faster
larger particles diffuse slower