Chem 1st Semester Final Review 2024

Front

What is the science that studies matter and its behavior?

Back

Chemistry

Front

What does the symbol 28Si indicate about a Silicon atom?

Back

It contains 14 protons and 14 neutrons.

Front

What is an isotope?

Back

An isotope is formed when an atom gains or loses neutrons.

Front

What type of mixture is characterized by a uniform composition?

Back

Homogeneous mixture.

Front

What type of mixture has a non-uniform composition?

Back

Heterogeneous mixture.

Front

What is a pure substance?

Back

A material with a constant composition and distinct chemical properties.

Front

What is electronegativity?

Back

A measure of the tendency of an atom to attract a bonding pair of electrons.

Front

Atoms with high electronegativity tend to:

Back

Hold on to their electrons more tightly.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.