Number of Neutrons

proton number, nucleon number and isotopes

Multiple Choice

Which one of the below is the nucleon number of an atom?

• he number of neutrons

• the number of protons

• the total number of protons and neutrons

• the total number of protons and electrons

Multiple Choice

look at the table and answer the question. Which row describes the structure of the positively charged sodium atom? sodium atom's mass number is 23 and atomic number is 11

• A

• B

• C

• D

Multiple Choice

An isotope of chromium is represented in the picture. Which statement about an atom of this isotope of chromium is correct?

• It contains 24 electrons

• It contains 24 neutrons.

• It contains 28 protons.

• It contains 52 neutrons

Multiple Choice

How many neutrons are present in the atom represented in the picture

• 21

• 24

• 45

• 66

Multiple Choice

An aluminium atom has a nucleon number of 27 and a proton number of 13.

How many neutrons does this aluminium atom contain?

• 13

• 14

• 27

• 40

Multiple Choice

Which pair of atoms contains the same number of neutrons?

Multiple Choice

check the table and give the correct answer. Which row gives the number of protons, electrons and neutrons found in an atom of zinc? mass number of zinc is 65 and its atomic number is 30

• A

• B

• C

• D

Multiple Choice

What number should be written under the 33 in this isotope notation for sulfur?

• -1

• 17

• 16

• 32

Multiple Choice

How many electrons does this isotope of beryllium have?

• 9

• 5

• 4

• 2

Multiple Choice

What is the mass number of this atom?

• 13

• 14

• 27

• 40

Multiple Choice

In a correctly written nuclear notation what would be located in the "A" position?

• number of neutrons

• atomic number

• number of electrons

• mass number

Multiple Choice

What do these isotopes of carbon all have in common?

• neutrons & mass number

• atomic number and neutrons

• atomic number and protons

• protons, atomic number, and mass number

Multiple Choice

How many electrons does a Copper atom have?

• 63
• 29
• 92
• 34

Multiple Choice

What is the atomic number of this atom?

• 2

• 4

• 6

• none of the above

Multiple Choice

What is the atomic number of this atom?

• 2

• 4

• 6

• none of the above

Multiple Choice

Which statements about isotopes of the same element are correct?

1. They are atoms which have the same chemical properties because they have the same number of electrons in their outer shell.

2. They are atoms which have the same number of electrons and neutrons but different numbers of protons.

3. They are atoms which have the same number of electrons and protons but different numbers of neutrons.

• 1 and 2

• 1 and 3

• 2 only

• 3 only

Multiple Choice

Which definition of isotopes is correct?

• atoms of the same element that have the same number of electrons and nucleons

• atoms of the same element that have the same number of neutrons and protons

• atoms of the same element that have the same number of protons but a different number of electrons

• atoms of the same element that have the same number of protons but a different number of

  nucleons

Multiple Choice

Which statement about the isotopes of an element is correct?

• Their physical properties are different because they have different proton numbers.

• Their atomic masses are different because they have different numbers of electron shells.

• They have the same chemical properties because they have the same number of electrons in their outer shells.

• They have the same physical properties because they have the same number of neutrons in

  their nuclei.

Multiple Choice

Which statement explains why isotopes of an element have the same chemical properties?

• They have different numbers of neutrons.

• They have the same number of electrons as protons.

• They have the same number of electrons in the outer shell.

• They have the same number of protons in the nucleus.

Multiple Choice

Which row describes isotopes of the same element in the table?

• A

• B

• C

• D

Multiple Choice

The number of particles in atoms W, X, Y and Z are shown in the table. which statement is correct.

• W and X are isotopes of carbon.

• X and Y are isotopes of nitrogen

• X has a mass number of 12.

• Z has an atomic number of 8

Multiple Choice

Carbon has several Isotopes, for example, carbon 12 and carbon 13 as shown in the table. which number of subatomic particle is same for these two atoms.

• proton number

• neutron number

• nucleon number

• boson number

Multiple Choice

Carbon has several Isotopes, for example, carbon 12 and carbon 13 as shown in the table. which number of subatomic particle is different for these two atoms.

• proton number

• neutron number

• electron number

• fermion number

Multiple Choice

which one of the below is an isotope of the atom in the picture.

Multiple Choice

Two isotopes of carbon are carbon-12 and carbon-14.  These isotopes differ from one another by two protons.

• true
• false

Multiple Choice

If X is the symbol for an element, which of the following two symbols represent    isotopes of the same element?     I. ⁷⁷₃₅X  II. ⁷⁷₃₃X  III. ⁸¹₃₇X  IV. ⁸¹₃₅ X

• I and II
• III and IV
• I and IV
• I and III

Multiple Choice

What do these isotopes of carbon all have in common?

• neutrons & mass number

• atomic number and neutrons

• atomic number and electrons

• protons, atomic number, and mass number