PLEASE HELPP!
True or False: Hydrogen is an alkali metal.

Answers

Answer 1
False most likely hydrogen is a type of gas so it might be false
Answer 2

Answer: falso

Explanation:


Related Questions

help please please please please please

Answers

Answer:

wow only six points, you have to amp it up a little

Explanation: because

B is number one and A is number two

what is the maximum receiving temperature for tcs in degrees fahrenheit

Answers

Explanation:

135F is the temperature

The maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.

What is TCS dishes?

Time/temperature control safety is a measurement of the temperature hold capacity of certain food, such as meat, fish, dairy, cream and custard products.

Thus, the maximum temperature that a TCS dishes can hold is 135° C and 275 Fahrenheit.

Learn more about TCS dishes

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What is the difference between a molecule and compound?

Answers

A compound is a special type of molecule where the atoms that form the molecule are of different elements.

Determine mass contribution for the following isotopes of the same element.

At the end, tell me the atomic mass of the element using the mass contributions.

Do not forget your units or the question will be marked incorrect.

Isotope 2 amu: 186.956

percent abundance: 62.6%

Atomic Mass of the element ?​

Answers

Answer: Not possible to find average amu with only the information provided.

Explanation:

Is there more information about the other isotopes?  I don't see how one could calculate an overall atomic mass with only one isotope is known.  An isotope of 186.956 with abundance of 62.6% isn't enough information.  We're not told anything about the other isotopes:  are they larger, smaller, and at what percentage.  If one has an amu of  204.956 at 37.4%, the overall atomic mass would be quite different than if it had an atomic mass of 182.956 at 37.4%.  More infornmation is required.

What isotope forms when radon-215 emits two alpha particle and three gamma rays

Answers

Ra215/86-> 2 (alpha)4/2 + 3 0y

Ra215/86-> 8/4 + 3 0y
204/79 AU

May not be true, I forgot the Numbers for gamma rays.

half of the earth is in the light and the other half is in the shadow because

Answers

Answer:

the sun doesn't shine on that half

Explanation:

when two or more elements are combined, the substance produced is a:

Answers

A compound is formed when two or more elements are chemically combined.

Ex: [tex]H{2}O[/tex]

A mixture is formed when two or more elements and/or compounds are physically combined.

Ex: [tex]NaCl + H{2}O[/tex]

Which of these is an example of chemical digestion?
(a person cutting food into small pieces with a knife)
(B
saliva breaking down molecules in the mouth)
(C bones leaching calcium into the bloodstream
)
(D a blender mixing solid food into a paste)

Answers

Answer:

B. Saliva breaking down molecules in the mouth

Explanation:

I'm pretty sure it's this because saliva contains enzymes and enzymes use chemicals to break down food in your mouth. For example, your mouth has an enzyme called amylase which helps to break down starches.

Answer:

B. Saliva breaking down molecules in the mouth

Explanation:

I'm pretty sure it's this because saliva contains enzymes and enzymes use chemicals to break down food in your mouth. For example, your mouth has an enzyme called amylase which helps to break down starches.Explanation:

is the moon bigger than neptune

Answers

Answer:

Neptune is bigger than the moon

Explanation:

The circumference of the moon is 6,783.5 miles

The circumference of Neptune is 96,129 miles

This means neptunes circumference is about 14 times the size of the moons

a) Give the reaction that occurs when 1 gram of sodium is added to 100 ml of ethanol.
b) This solution is then heated with 5 grams of 1-bromobutane. What is the maximum yield of the final product from this reaction?

Answers

B. This solution is heated with 5 grams of 1

Helpppppppppppppppppppp

Answers

Answer:

option B it was captured by earth's gravity

Explanation:

please Brinlmark me please

Help me pls I will mark you as brain

Answers

Answer: Is it sewage checks

It’s D hope this helps

Fossil fuels—such as coal, oil, and natural gas—come from ancient, and long dead, plant and animal matter. These fuels have been generated through millions of years of the Earth's geologic processes. Most fossil fuel reserves are found underground, relatively close to the Earth's surface.

At the current rate that human civilization is burning fossil fuels for energy, the Earth's geologic processes have no chance of keeping pace. This means that fossil fuels are a _______ energy resource.
A.
synthetic
B.
nonrenewable
C.
plentiful
D.
renewable

Answers

Answer:

Nonrenewable

Explanation:

There is a finite supply of fossil fuels

when using a ph meter to monitor a stirring reaction mixture, where should you place the ph sensor electrode?

Answers

Answer:Between the stirring vortex and the side of the glassware

When using a ph meter to monitor a stirring reaction mixture, the ph sensor electrode

should be placed;

between the stirring vortex and the side of the glassware.

The pH meter is an electric device that is used to measure the hydrogen-ion activity in water-based solutions. This means that it is used to measure the PH which is the acidity or alkalinity.

The pH meter is made up of a voltmeter attached to a pH-responsive electrode and a reference electrode.

Now, this pH-responsive electrode is usually made of glass while the reference electrode is usually a silver–silver chloride electrode.

Now when monitoring the stirring reaction mixture, the PH-responsive electrode written above is usually placed between the stirring vortex and the side of the glassware.

Read more at; https://brainly.com/question/24242819

Is table salt dissolved in water a homogeneous or heterogeneous mixture

Answers

Answer:

heterogeneous

Explanation:

I said so jit

In an experiment to determine how to make sulfer trioxide, a chemist combines 32.0g of sulfer with 50.0g of oxygen. She finds that she made 80.0g of sulfer trioxide and had 2.0 g of leftover oxygen. How would the chemist make 100.0 g of sulfer trioxide so that she has no leftovers?

Answers

Explanation:

i Forgot the answer sorry but ihave that module

What is the last step in the scientific method?

Answers

Answer:

D. Communication of results

Answer:

b.

conclusion

because it gives the overall information about the experiment

Which of the following describes a low viscosity liquid

Answers

Answer:

a liquid that is thick and sticky

Explanation:

during June , earth is 152,000,000km from the sun. how far is earth from the sun in miles​

Answers

Answer:

94448421.2201

Explanation:

multiply the value in kilometers by the conversion factor '0.62137119223684'.

So, 152000 kilometers = 152000 × 0.62137119223684 = 94448.42122 miles.

94448421.2 miles away from earth!

cacs hạt cấu tạo nên hầu hết cac nguyên tử là

Answers

proton, neutron và electron - bao gồm các hạt thậm chí còn nhỏ hơn, chẳng hạn như quark.

Hy vọng nó giúp!

Is carbon mixed with sand a homogeneous or heterogeneous mixture

Answers

Answer:

homogeneous

Explanation:

because I said so

A carbon mixed with sand is a heterogenous mixture.

What is heterogenous mixture?

Mixture is defined as a combination to two or more simpler substances.

There are two types of mixture

Homogenous mixture - A homogenous mixture is defined as a mixture of two or more component which is uniform throughout the mixture. They include water, air, steel etc.Heterogenous mixture - A heterogenous mixture is defined as a mixture of two or more phase which is not uniform throughout the mixture. They include sand and water, salt and oil etc. They are a non uniform mixture with visible or invisible particles.

Thus, carbon mixed with sand is a heterogenous mixture.

To learn more about heterogenous mixture, refer to the link below:

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H2F5BLi

How many atoms are in the chemical formula?

Answers

Answer:

eight atoms

hope it helps

Physical Models Activity (I need help)

You have explored some interesting, informative, and amusing examples of models. Now it's time to get creative and make your own model. Here is the requirement checklist for your model:

✔ Model types can include drawings, diagrams, physical models, virtual simulations, or videos.
✔ Models must be created by you, not something selected from an online or outside source.
✔ Submit a presentation, picture, video, or screenshot of your model.
✔ Submit a one-paragraph summary describing the topic you chose, your model, what it represents, how you made it, and the specific science involved. It is important that you are using science terminology and are accurate.
Now that you know how to create and submit your model, you will need to choose a topic for your model. Choose one of the three topics listed below. Select each topic for an overview.

Conservation of Mass
Atomic Theory
Thermal Energy

Answers

The question above wants to assess your ability to create a model to represent a scientific concept. In that case, I can't create the model for you, but I'll show you how to create that template.

First, you must choose one of the topics presented in the question. I suggest that you choose the topic "Conservation of Masses," because of its simplicity, however you should choose the one you are most familiar with.

Next, you should research this topic and look at the factors that make it up.

After that, you can create your template as follows:

Use a software that has ready-made drawings, mainly geometric figures, for you to represent the elements that make up this topic.Use these drawings to represent these elements, place titles that identify them, and add arrows, which direct the viewer's attention to understand the model.

You can see examples of "Conservation of Masses,"  models in the attached figure.

More information:

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Please help!!!

When magnesium hydroxide, Mg(OH)2, is added to water it...

Select one:
a. falls to the bottom of the beaker undissolved.
b. reacts with the water to form Mg(OH)4
c. produces an acidic solution.
d. dissociates into Mg+2 and (OH)4​

Answers

Answer:

B

Explanation:

i think it is b Intermediate Mg(OH) reacts with H2O to form the reaction products H2 and Mg(OH)2. There are two kinds of reaction channels.

why are magnesium fluoride and calcium allowed in water

Answers

Answer:

calcium allowed in

Explanation:

Why are magnesium, fluoride, and calcium allowed in water?

✓ They’re naturally occurring elements in many springs & aquifers used for water supply purposes - calcium and magnesium are also essential minerals

when an atom become a negative ion, where do the extra electrons come from?

Answers

Answer:

Valence Shell

Explanation:

Some atoms have nearly eight electrons in their valence shell and can gain additional valence electrons until they have an octet. When these atoms gain electrons, they acquire a negative charge because they now possess more electrons than protons.

raw or undercooked shellfish may be contaminated with what type(s) of bacteria
vibrio vulnificus
salmonella
vibrio vulnificus and vibrio parahaemolyticus

Answers

Answer:

vibrio vulnificus and vibrio

Explanation:

Answer:

vibrio vulnificus and vibrio parahaemolyticus

Max Plank created the idea of quanta4 or quantum energy. This is?

Answers

Answer:

A theory of physics in which energy exists only in discrete quantities, called quanta. It was originated in 1900 by the German physicist Max Karl Ernst Ludwig Planck (1858–1947), who suggested that electromagnetic radiation is quantized, i.e. it can be emitted or absorbed only in tiny packets, not continuously.

Explanation:

how much muriatic acid to lower alkalinity in pool

Answers

Answer:

One gallon of muriatic acid

Explanation:

i think

What is an atomic nucleus?

the outer part of an atom in which electrons move
the outer part of an atom in which neutrons move
the central part of an atom, composed of protons and neutrons
the central part of an atom, composed of protons and electrons

Answers

Answer:-

the central part of an atom compsed of protons and neutrons.

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