Chemistry Final

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 magnesium have?

Back

Magnesium has 2 valence electrons.

Front

What is the chemical formula for water?

Back

The chemical formula for water is H2O, which indicates it contains 2 hydrogen atoms and 1 oxygen atom.

Front

How many atoms of oxygen are in 8 molecules of water?

Back

There are 16 atoms of oxygen in 8 molecules of water (8 H2O = 8 x 2 = 16 O).

Front

What is a single replacement reaction?

Back

A single replacement reaction is a type of chemical reaction where one element replaces another in a compound.

Front

Classify the reaction: A + BC → B + AC.

Back

This is a single replacement reaction.

Front

What particles are found in the nucleus of an atom?

Back

Protons and neutrons are found in the nucleus of an atom.

Front

Which particle is NOT found in the nucleus of an atom?

Back

Electrons are NOT found in the nucleus; they orbit around it.

Front

What is a mole in chemistry?

Back

A mole is a unit that measures the amount of substance, defined as 6.022 x 10^23 particles (atoms, molecules, etc.).

Front

How many moles of water are formed from 12 moles of acetylene gas in a reaction?

Back

12 moles of water are formed from 12 moles of acetylene gas.