#1 Final Review

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How many valence electrons does an atom with 3 valence electrons have?

Back

3

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the nucleus of an atom?

Back

The nucleus is the central part of an atom, containing protons and neutrons.

Front

How many protons are in an atom with an atomic number of 35?

Back

35 protons.

Front

What is a chemical equation?

Back

A chemical equation is a symbolic representation of a chemical reaction, showing the reactants and products.

Front

What does it mean to balance a chemical equation?

Back

Balancing a chemical equation means ensuring that the number of atoms for each element is the same on both sides of the equation.

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in g/cm³.

Front

How do you calculate mass using density and volume?

Back

Mass = Density × Volume.

Front

What is the density of aluminum?

Back

The density of aluminum is 2.70 g/cm³.