Quiz #3 - NG Science 1

Atoms are the smallest particles of matter.

• True
• False

Identify which of the following best describes the structure of an atom.

• A positively charged nucleus circled by widely spaced negatively charged particles
• A nucleus that is mostly empty space with charged particles circling around it
• A neutral nucleus circled by particles with positive and negative charges

Classify the subatomic particle labeled A.

• A nucleus
• A neutron
• An electron
• A proton

Classify the subatomic particle labeled D.

• A nucleus
• A neutron
• An electron
• A proton

The subatomic particle labeled C has no electrical charge. Classify this particle.

• A nucleus
• A neutron
• An electron
• A proton

For the atom shown in the diagram below, determine which two of the following have a similar mass.

• A nucleus and proton
• A neutron and electron
• An electron and proton
• A proton and neutron

An atom is electrically neutral if it has equal numbers of:

• neutrons and electrons
• protons and neutrons
• protons and electrons

In all atoms, the number of protons is the same as the:

• number of neutrons
• atomic number
• mass number

Any two atoms that have the same number of protons:

• belong to the same isotope
• belong to the same element
• have the same overall charge
• have the same mass number

Complete the equation: mass number =

• number of neutrons + number of protons
• number of neutrons + number of electrons
• number of protons + number of electrons
• number of protons