Chemistry grade 7

Front

What is the proper name for CaCl2?

Back

Calcium chloride

Front

What is the chemical symbol for Silicon?

Back

Si

Front

Which of these is NOT a sign that a chemical change has occurred?

Back

A loss of transparency

Front

Electrons are positively / negatively charged. ___________________.

Back

Negatively

Front

What is the 7th Element on the periodic table?

Back

Nitrogen

Front

What is the chemical formula for water?

Back

H2O

Front

What is the process of a solid turning into a gas called?

Back

Sublimation

Front

What is the pH level of pure water?

Back

7 (neutral)

Front

What is the term for a substance that cannot be broken down into simpler substances?

Back

Element

Front

What is the main gas in the Earth's atmosphere?

Back

Nitrogen (approximately 78%)