Chemical formulas practice

Quiz
•
Chemistry
•
12th Grade
•
Medium
Standards-aligned
Robert Pike
Used 3+ times
FREE Resource
63 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct formula for the ionic compound formed between sodium and chlorine?
NaCl
Na2Cl
NaCl2
Na2Cl3
Answer explanation
The correct formula for the ionic compound formed between sodium (Na) and chlorine (Cl) is NaCl. Sodium has a +1 charge and chlorine has a -1 charge, resulting in a 1:1 ratio, hence NaCl is the correct choice.
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following represents a correct binary ionic compound?
K2O
CO2
MgCl
H2S2
Answer explanation
K2O is a correct binary ionic compound, consisting of potassium (K) and oxygen (O) ions. The other options either contain covalent bonds (CO2, H2S2) or are not properly formed ionic compounds (MgCl).
Tags
NGSS.HS-PS1-2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the formula for the compound formed between aluminum and oxygen?
AlO2
Al2O
Al2O3
AlO3
Answer explanation
The correct formula for the compound formed between aluminum and oxygen is Al2O3. Aluminum has a +3 charge and oxygen has a -2 charge, requiring two aluminum ions to balance three oxide ions, resulting in Al2O3.
Tags
NGSS.HS-PS1-2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which pair represents a correct binary ionic compound?
CaF2
CO
Na2O2
KClO
Answer explanation
CaF2 is a correct binary ionic compound, consisting of calcium (Ca) and fluoride (F) ions. The other options either contain covalent bonds (CO) or are not simple binary ionic compounds (Na2O2, KClO).
Tags
NGSS.HS-PS1-2
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct formula for the ionic compound formed between magnesium and bromine?
MgBr
MgBr2
Mg2Br
Mg2Br3
Answer explanation
The correct formula for the ionic compound formed between magnesium (Mg) and bromine (Br) is MgBr2. Magnesium has a +2 charge and bromine has a -1 charge, requiring two bromine ions to balance the charge.
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is a correct binary ionic compound?
Na2S
NaNO3
Al2(SO4)3
CaCO3
Answer explanation
Na2S is a binary ionic compound consisting of sodium (Na+) and sulfide (S2-) ions. The other options contain polyatomic ions or are not purely ionic, making Na2S the correct choice.
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct formula for the ionic compound formed between potassium and sulfur?
K2S
KS2
K2SO4
KSO4
Answer explanation
The correct formula for the ionic compound formed between potassium (K) and sulfur (S) is K2S. Potassium has a +1 charge and sulfur has a -2 charge, requiring two potassium ions to balance one sulfur ion.
Tags
NGSS.HS-PS1-1
NGSS.HS-PS1-2
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