Physical Science EQT Q1 Review 2018

Front

What is a valence electron?

Back

The number of electrons in the last shell of an atom.

Front

Is the equation Al + O₂ → 2Al₂O₃ balanced?

Back

No

Front

When are atoms most stable?

Back

Atoms are most stable when their outer shell is complete.

Front

Which of these is not a real bond in chemistry?

Back

James

Front

In the equation 2Mg + O₂ → 2MgO, what are the reactants?

Back

Mg and O

Front

What is an atom?

Back

The basic unit of a chemical element.

Front

What is a molecule?

Back

A group of atoms bonded together.

Front

What is an ionic bond?

Back

A bond formed by the transfer of electrons from one atom to another.

Front

What is a covalent bond?

Back

A bond formed by the sharing of electrons between atoms.

Front

What is a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.