The atomic structure

Compared to the charge and mass of a proton, an electron has

• the same charge and a smaller mass

• the same charge and the same mass

• opposite charge and smaller mass

• opposite charge and the same mass

Neutrons have _________ .

• no electric charge

• positive charges

• negative charges

• particles

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

• neutron

• electron

• atom

• nucleus

Atoms consist of which of the following?

• Protons

• Molecules

• Neutrons

• Electrons

Positively-charged particles are called .

• Protons

• Neutrons

• Electrons

• Electrolytes

Electrons have _______ .

• no charges

• positive charges

• negative charges

• fast charges

What particle is found in the nucleus and has no charge?

• Electron

• Neutron

• Proton

• Atom

Why does an atom have no net electric charge?

• Its subatomic particles carry no electrical charge.

• The positively charged protons cancel out the negatively charged neutrons.

• The positively charged neutrons cancel out the negatively charged electrons.

• The positively charged protons cancel out the negatively charged electrons.

The negatively charged particles in an atom that orbit around the nucleus are called .

• protons

• neutrons

• electrons

• none of them

The space surrounding the nucleus of an atom contains .............................. .

• protons

• electrons

• neutrons

• nothing