SGO Review Academic Chemistry

Which of the following is a formula for a compound?

• Fe

• Cl₂

• C

• H₂O

Which of the following is the formula for an element

• Br₂

• H₂O

• CO₂

• FeO

What is the nuclear symbol for the atom shown in the image?

• ⁴Be

• ⁴He

• ²He

• ²Be

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

What is the relationship between the given atoms?

• ions

• isotopes

• neutral atom

How many electrons does this magnesium ion have?

• 24

• 12

• 10

• 14

Which are signs of a chemical change? CHOOSE ALL THAT APPLY

• gas bubbles forming

• solid melting

• solid dissolving

• formation of a precipitate

• formation of a precipitate

Which of the following is the correct Lewis dot structure for the molecule fluorine (F₂)?

• A
• B
• C
• D

What is the correct formula for this molecule?

• Si₄F
• SiF₄
• SiF
• Si₄F₄

LiBr is called

• lithium bromine

• lithium (I) bromine

• lithium bromide

• lithuim (I) bromide