Semester 1 Final Chem --- 2024

Front

What is the symbol for Phosphorus?

Back

P

Front

What are atoms with the same number of protons but different numbers of neutrons called?

Back

Isotopes

Front

What is the correct formula for sodium oxide?

Back

Na2O

Front

Which scientist proposed that electrons move in specific circular paths around the nucleus?

Back

Bohr

Front

What is the relationship between wavelength and frequency?

Back

The longer the wavelength, the lower the frequency.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an ion and a cation?

Back

An ion is a charged atom; a cation is a positively charged ion.

Front

What is the principle of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is a chemical bond?

Back

A lasting attraction between atoms that enables the formation of chemical compounds.

Front

What is the difference between an endothermic and exothermic reaction?

Back

Endothermic reactions absorb heat; exothermic reactions release heat.