The Elements
Atoms
The Periodic Table
Ions
Molecules
100

Neon has this many valence electrons.

What is 8?

100

These particles have no charge but contribute to the mass of an atom.

What are neutrons?

100

The members of this family of elements all have 2 valence electrons.

What are the alkaline-earth metals (or group 2A)?

100

This type of bond is formed when two oppositely-charged particles strongly attract.

What is an ionic bond?

100

This type of bond occurs when two or more atoms share electrons.

What is a covalent bond?

200

Each atom of this element contains 23 protons.

What is vanadium (V)?

200

The outermost electrons in an atom.

What are the valence electrons?

200

This family of elements are the least reactive in the entire periodic table.

What are the noble gases?

200

The number of electrons in an Al3+ ion.

What is 10?

200

The correct name of the compound SO2.

What is sulfur dioxide?

300

This element in period 4 has a fully-filled d-sublevel.

What is zinc (Zn)?

300

This subatomic particle determines the identity of an atom.

What is a proton?

300

This is the only nonmetal on the left side of the periodic table.

What is hydrogen (H)?

300

The correct name of the compound with the chemical formula Zn(NO2)2.

What is zinc nitrite?

300

These diagrams show how atoms can share electrons and form molecules.

What are Lewis structures?

400

This element has the smallest atomic radius of any element.

What is helium (He)?

400

The maximum number of electrons a p-sublevel can hold.

What is 6?

400

Elements in the same column tend to share these types of properties.

What are chemical properties?

400

The correct formula for the compound gallium hypochlorite.

What is Ga(ClO)3?

400

The correct formula for the compound trisilicon tetraboride.

What is Si3B4?

500

This element's shorthand electron configuration is [Xe]6s24f145d106p3.

What is bismuth (Bi)?

500

Examples include carbon-12, carbon-13, and carbon-14, these are atoms of the same element with different masses.

What are isotopes?

500

This element has the least number of electrons in period 5.

What is rubidium (Rb)?

500

The charge of Mn in the compound MnS2.

What is 4+?

500

The number of valence electrons in the polyatomic ion PO43-.

What is 32?