Chemistry I (pre-assessment)

Which sub-atomic particle has no charge?

• Electron

• Proton

• Neutron

• Neutrino

In a balanced atom, the number of protons is equal to the number of

• neutrons

• the atomic mass

• electrons

• isotopes

Electrons are arranged around the nucleus of an atom in shells called

• layers

• energy levels

• orbits

• pathways

The electrons in an atom's outermost shell are called

• latent electrons

• outer electrons

• valence electrons

• high energy electrons

Vertical columns in the periodic table are called

• periods

• groups

• families

• bars

For metals, reactivity _______ as you go downwards on the periodic table

• doubles

• stays the same

• decreases

• increases

Select two answers.

The middle portion of the periodic table contains ______ and ______.

• transition metals

• halogens

• rare earths

• alkali earths

An ion is an atom that has lost or gained 1 or more

• electrons

• neutrons

• protons

• cats

Group 2 elements have 2 electrons in their outer shell. When they from ions, they lose these 2 electrons and have an overall _____ charge.

• +1

• -1

• +2

• -2

Non-metallic atoms tend to gain electrons and form what kind of ions?

• neutral ion

• cations

• anions

• onions