ATOMS AND BONDING REVIEW

Based on the contributions of early scientists, one can conclude that one discovery was ___________________.

• One scientist made more significant contributions than others.

• Hundreds of years passed between discoveries.

• People did not think about the atom after 1913.

• One discovery was important for another.

If an atom gains an electron, then the atom will become _____________________.

• a positive ion.

• a negative ion.

• a neutral atom.

• an isotope.

An atom has 6 protons, 6 electrons, and 8 neutrons. What is the mass of the atom? ____________

• 6 amu

• 8 amu

• 12 amu

• 14 amu

If you were to model an atom using the solar system, what would the sun represent? _______________________

• an ion

• a nucleus

• a neutron

• an electron

If an atom is neutral, it has an equal number of ________________________ and ______________________________.

• electrons and neutrons.

• protons and neutrons.

• protons and electrons.

• protons, neutrons, and electrons.

An atom has two main parts, they are the ________________________ and the _____________________ . Inside the nucleus you will find the __________________________ and ___________________________ and orbiting around the nucleus you will find the ________________________________.

• nucleus, shells, protons, neutrons, electrons

• protons, electrons, nucleus, shells

• electrons, neutrons, protons, shells

• neutrons, protons, shells, electrons

Most of the mass of the atom is found in the ____________________________.

• electrons

• protons

• neutrons

• nucleus

Neutrons are found in the _____________________________ and they have a _____________________________ charge.

• nucleus, positive

• nucleus, no

• shell, no

• shell, negative

In the following process, Na --> Na+ what has taken place?

• loss of a proton

• gain of a proton

• loss of an electron

• gain of an electron

1. In a negatively charged ion, you have more ______________________ than _______________________________.

• a heavier nucleus.

• a greater atomic mass.

• more electrons than protons.

• more electrons than neutrons.