CHEMISTRY: ATOMS, COMPOUNDS, IONS (FORMULA AND SYMBOLS)

H₂O

2H₂O means that there are 2 molecules of water (________= water)

Parentheses

________ are used to enclose polyatomic ions when there is more than one of the ions in a unit of a compound.

Ions

________ can be either positive or negatively charged.

chemical reaction

In a(n) ________ the water in hydrate does not react.

molecules of water

The two ________ both contain 2 hydrogen atoms and 1 oxygen atom.

NO₃

________ has 1 nitrogen atom and 3 oxygen atoms.

amount of protons

Its charge depends on the ________ and electrons.

Atoms

________ and compounds contain an equal amount of positively charged protons and negative charged electrons, which produces a neutral atom.

Polyatomic ion

________: a group of atoms covalently bonded together.

Atoms

________ and compounds are neutral (no net charge)

Polyatomic ion

a group of atoms covalently bonded together

Answer

3 calcium atoms, 6 nitrogen atoms, and 18 oxygen atoms

Hydrates

crystalline form of an ionic substance that contains a definite number of water molecules

polyatomic ion

covalently bonded group of atoms

Ionic Charge

The electric charge of an ion that is Represented by a superscript following the symbol of the ion.

Positive Charge

having greater protons than electrons

Negative Charge

having greater electrons than protons

Net Charge

total sum of charges