Chemistry FINAL EXAM

Front

What is VSEPR theory?

Back

VSEPR theory (Valence Shell Electron Pair Repulsion theory) explains the shapes that electrons make around atoms when they repel each other.

Front

How many significant figures does the number 0.002040 have?

Back

4 significant figures.

Front

What happens to particles in an object at higher temperatures?

Back

Particles in an object move faster.

Front

What is the correct Lewis dot structure for Carbon (C)?

Back

The correct Lewis dot structure for Carbon is represented as D.

Front

Express the number 0.000457 in scientific notation.

Back

4.57 x 10^-4.

Front

Define significant figures.

Back

Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion.

Front

What is the principle behind the kinetic molecular theory?

Back

The kinetic molecular theory states that gas particles are in constant motion and that the temperature of a gas is a measure of the average kinetic energy of its particles.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.

Front

What is the difference between an ionic bond and a covalent bond?

Back

An ionic bond is formed when electrons are transferred from one atom to another, while a covalent bond is formed when two atoms share electrons.

Front

What is the formula for calculating density?

Back

Density = Mass/Volume.