Chem Sem1 Review

Front

What is the role of flip flops in heating substances?

Back

Flip flops are not appropriate footwear when heating substances due to safety concerns.

Front

What forms when an atom loses electrons?

Back

Cations form when an atom loses electrons.

Front

What is the definition of a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

Convert 8.350 x 10^-7 to standard notation.

Back

0.000000835

Front

What is the chemical formula for the compound formed between potassium and chlorine?

Back

KCl

Front

What happens to water in the cracks of rocks when it freezes?

Back

Water expands when it freezes, which can cause rocks to break apart over time.

Front

What is scientific notation?

Back

Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form.

Front

What is the difference between cations and anions?

Back

Cations are positively charged ions formed when an atom loses electrons, while anions are negatively charged ions formed when an atom gains electrons.

Front

What is an example of a chemical change?

Back

An example of a chemical change is the rusting of iron.

Front

What is the significance of the chemical formula KCl?

Back

KCl indicates a 1:1 ratio of potassium ions to chloride ions in the compound.