Atomic Structure Quiz 2

1.

1 point

The atomic number of an atom is total number of _______ in the nucleus.

neutrons

protons

protons and neutrons

protons and electrons

2.

1 point

Which of the statements describes isotopes ?

Isotopes have the same atomic number but have different mass numbers

Isotopes are atoms of the same element

Isotopes have a the same number of protons but a have different numbers of neutrons

all of the above

3.

1 point

An atom has no overall charge if it contains an equal number of

neutrons and electrons

neutrons and protons

None of the above

electrons and protons

4.

1 point

Atoms are composed of

electrons and neutrons.

protons and neutrons.

atomic mass unit.

protons, neutrons and electrons.

5.

1 point

An atom of oxygen with 8 protons, 8 electrons, and 8 neutrons would have an atomic mass of

36

24

8

16

6.

1 point

All atoms of an element are the same because

the number of protons in each atom is the same.

the number of electrons in each atom is the same.

they are not isotopes.

the number of neutrons in each atom is the same.

7.

1 point

The current model of the atom suggest that

electron clouds surround the nucleus

electrons travel in definite paths around the nucleus

proton clouds surround the nucleus

the exact path of a moving electron can be predicted

8.

1 point

What is the charge and location of a proton in an atom?

postive, inside the nucleus

no charge, inside the nucleus

postive and outside the nucleus

no charge, outside the nucleus

9.

1 point

Which of the following has the LEAST mass?

neutron

electron

proton

nucleus

10.

1 point

The size of atoms

vary widely.

cannot be measured.

vary only a little bit.

are exactly the same are exactly the same.

11.

1 point

The smallest particle into which an element can be divided and still be the same substance is a(n)

molecule

atom

proton

electron

12.

1 point

What particles make up a nucleus ?

protons and neutrons

neutrons

electrons and neutrons

electrons, protons and neutrons

13.

1 point

Isotopes exist because atoms of the same element can have different numbers of

none of the above

neutrons

protons

electrons

14.

1 point

Which of the following determines the identity of an element ?

mass number

overall charge

atomic number

atomic mass

15.

1 point

Electrons are particles that

help make up the nucleus and are negatively charged.

help make up the nucleus and are positively charged.

are located outside of the nucleus and are negatively charged.

are located outside of the nucleus and have no charge.

16.

1 point

An atom of nickel has an atomic number of 28 and an atomic mass of 58. How many neutrons are in an atom of nickel ?

58

28

30

86

17.

1 point

How many protons does an atom have with an atomic number of 23 and an atomic mass of 51 have ?

23

28

51

74

18.

1 point

If a boron atom has 5 protons, 6 neutrons, and 5 electrons, it has an atomic mass of

5

10

11

6

19.

1 point

An atom of nickel has an atomic number of 28 and an atomic mass of 58. How many protons are in this atom of nickel ?

58

28

86

30

20.

1 point

What are the 3 main parts of an atom ?

protons, neutrons, and molecules

protons, neutrons and electrons

protons, nucleus, and electrons

protons, electrons, and atoms

21.

1 point

Neutrons are particles that

are located outside the nucleus and have no charge.

help make up the nucleus and have no charge.

are located outside of the nucleus and are negatively charged.

help make up the nucleus and are positively charged.