What defines the mass number of an isotope? the sum of the neutrons and protons the sum of the neutrons and electrons the number of neutrons the number of protons

Answers

Answer 1

Answer:

Answer:

The mass number of an isotope is the sum of neutrons and protons.

Explanation:

In any elemental isotope, the only things that will affect molar mass and mass number is the number of protons and neutrons. Electrons are not counted because we usually assume they are equal to the amount of protons and have no weight.

Protons are what gives the element its atomic number and the neutrons determine the type of isotope it is within the element.

For instance:

There can be a regular Carbon - 12

But there are isotopes like Carbon - 13 and Carbon - 14.

*The number of protons stays the same but the number of neutrons are different

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Which refers to a mixture that contains more than one phase in which the characteristics of the particles vary throughout the mixture?

Answers

This type of mixture is a heterogeneous mixture. It is any mixture that is not uniform. Heterogeneous mixtures always have more than one phase.It is made up of substances which stays physically separate with each other. Best example is a mixture of sand and sugar. If you get two samples from different points of the mixture and analyze it, you will see that the concentrations of the components are different and that the two solid phases never combine with each other.

Answer:

C. Heterogeneous

Explanation:

Is freezing water a physical or chemical change

Answers

Freezing water is a physical change, because it just changes the form of water, no it's chemical structure.

All atoms of the same element have the same ____.

Answers

Answer:

The correct answer is protons.

Explanation:

Hello! Let's solve this!

All atoms of the same element have the same number of protons. The isotopes of an element are chemical species that change the number of neutrons but not that of protons.

Then the different atoms of the same element differ in their protons.

The correct answer is protons.

All atoms of the same element have the same number of protons.

Protons are subatomic particles that are found within the nucleus of an atom. They have a positive electrical charge, which is equal in magnitude but opposite in sign to the negative charge of electrons. Protons are one of the three main types of particles found in atoms, along with neutrons and electrons.

The number of protons in an atom determines its atomic number and defines the element. For example, an atom with one proton is hydrogen (H), while an atom with six protons is carbon (C).

Learn more about protons, here:

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The number of neutrons in the nucleus of an atom can be determined by(1) adding the atomic number to the mass number
(2) subtracting the atomic number from the mass number
(3) adding the mass number to the atomic mass
(4) subtracting the mass number from the atomic number

Answers

Option no. 2 subtracting the atomic number from the mass number

Example: Zn - 65 atomic weight or mass/mass number
30 atomic number

65-30 = 35 number of neutrons

one isotope of a metallic element has a mass number of 65 and 35 neutrons in the nucleus. the cation derived the isotope has 28 electrons. write a nuclear symbol for this element

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the electrons and protons would be the same amount than take the atomic mass-the atomic number get the answer that way

HELP UNDERSTAND, PLEASE! In a reaction, 15 moles of carbon dioxide are produced from 5 moles of iron (III) oxide and 15 moles of carbon monoxide. What is the mole ratio of carbon dioxide to carbon monoxide?

15:5

5:15

1:3

1:1

Answers

My best guess has to be 1:3

15:15 is equal to 1:1

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