Homework Practice

Printable assignment

Atomic Starter: Particles Inside Matter

Section A: Atoms as Basic Units

Question 1mcq

An atom is best described as:

A.A mixture of many compounds

B.The basic unit of an element

C.A type of tissue

D.A cell organelle

Question 2mcq

Atoms of the same element have the same:

A.Number of neutrons always

B.Mass number always

C.Physical size only

D.Atomic number

Question 3mcq

Different elements differ mainly in their number of:

A.Electrons only in ions

B.Protons

C.Shells always

D.Neutrons only

Question 4mcq

Which subatomic particle has negative charge?

A.Proton

B.Electron

C.Nucleus

D.Neutron

Question 5mcq

Which subatomic particle has no charge?

A.Neutron

B.Ion

C.Electron

D.Proton

Question 6mcq

The nucleus contains:

A.Only electrons

B.Protons and neutrons

C.Only empty space

D.Only shells

Section B: Comparing Protons, Neutrons and Electrons

Question 7mcq

Protons are found in the:

A.Cell wall

B.Nucleus

C.Cytoplasm

D.Outer shells only

Question 8mcq

Electrons are found in:

A.Inside protons

B.Only in neutrons

C.Only outside atoms as cells

D.Shells around the nucleus

Question 9mcq

The relative mass of an electron is:

A.Very small compared with proton or neutron

B.Greater than proton

C.Same as full atom always

D.Zero charge means zero mass

Question 10mcq

A neutral atom has equal numbers of:

A.Shells and neutrons

B.Neutrons and electrons always

C.Protons and electrons

D.Protons and neutrons always

Question 11mcq

If an atom has 11 protons and is neutral, it has:

A.11 electrons

B.22 electrons

C.12 electrons

D.10 electrons

Question 12mcq

An atom with 17 protons belongs to the element with atomic number:

A.17

B.7

C.34

D.18