Ionic Compounds and Formulas

What is an ionic formula?

• An element symbol for an atom

• The formula of two cations combined together

• A chemical formula for ionic compounds

• The formula describing the change of a cation to an anion

Tags

NGSS.HS-PS1-3

An ionic formula consists of

• Only cations

• Only anions

• Neither cations or anions

• Both cations and anions

What is the ionic compound AgBr?

• Silver Bromide

• Argon Bromine

• Arsenic Barium

• Astatine Bromine

What is an ionic compound?

• Compounds consisting of ions

• Elements consisting of compounds

• An atom that has converted to an ion

• When the mass number of a compound decreases by 2

Tags

NGSS.MS-PS1-5

The ions Ca²⁺ and PO₄ ^3- form a salt with the formula __________.

• CaPO₄

• Ca₂(PO₄)₃

• Ca₂PO₄

• Ca₃(PO₄)₂

Answer explanation

The crossover method where Ca2+ and PO4 3- --> Ca3(PO4)2 where the charges become the subscripts. This reveals the correct formula. Simplify, when possible.

The correct formula for the salt formed by Ca^2+ and PO4^3- ions is Ca3(PO4)2. This is named Calcium Phosphate.

Tags

NGSS.MS-PS1-1

Write the ionic formula for the compound formed between barium and nitrate.

Which of the following is the correct formula for sodium bicarbonate?

Tags

NGSS.MS-PS1-1

Ionic compounds consist of ___________ and _____________

• Elements; Compounds

• Metals; Non-metals

• Alpha particles; Beta particles

• Beta particles; Gamma particles

• Barium Chloride

• Chloride Barium

Tags

NGSS.MS-PS1-1

• Oxide Aluminium

• Aluminium Oxide

Tags

NGSS.MS-PS1-1