Chapter 3 Review: Atomic Structure

An atom is the smallest particle that can still have the __________ characteristics of an element

Answer explanation

While there are particles that are smaller than atoms, these particles do not display the chemical characteristics of an element.

Match the following charges to their respective sub-atomic particles

• neutron

• 0

• electron

• -1

• proton

• +1

Atoms contain the same number of​​ protons and ​ (a)   .

• electrons
• neutrons
• nucleons
• electron shells
• valence electrons

The overall net charge of an atom is

• positive

• negative

• neutral

Which atom is represented by the diagram?

• ¹¹B

• ¹²B

• ¹¹C

• ¹²C

Which statement is correct?

• Electrons and protons have the same relative mass.

• The nucleus contains most of the mass of the atom.

• The nucleus and electrons repel each other.

• The nucleus has a negative charge.

Arrange the following particles in increasing order of neutrons.

• ³³S

• ⁴⁰K

• ⁴⁰Ar

• ³⁵Cl

• ⁴⁰Ca

Isotopes are atoms of the same element with the same ​ (a)   but have different number of ​ (b)   .

• atomic number
• neutrons
• electrons
• protons
• nucleon number
• nucleons
• mass number
• nuclide notation

Match the following subatomic particles to their relative masses.

• 1

• neutron

• 1/1840

• electron

• 1

• proton

Protons and neutrons are found in the ​

(a)   , while electrons are found in (b)   .

• nucleus
• electron shells