Final Review

What is an element?

A compound always contains two or more what joined in a fix proportion?

Why can properties of a mixture vary?

What is a physical property?

What is a chemical property?

Which subatomic particle has a negative charge?

The number of protons in one atom of an element is that element’s

To find the number of neutrons in an atom, you would subtract

How is the atomic mass of an elements determined?

The group on the far left of the periodic table contains the

The order of elements in the periodic table is based on

Atoms of elements that are in the same group have the same number of

What are valence electrons?

How many valence electrons does oxygen have?

How many valence electrons does carbon have?

How many valence electrons does boron have?

A mixture is different from a compound because each substance in a mixture

A gas has

Matter that has a definite volume but no definite shape is

What type of change occurs when water changes from a solid to liquid?

A chemical change usually includes the following things

A physical change is

A metal can rusting over time is a physical or chemical change?

Ice melting is a physical or chemical change?

Ripping a piece of paper into a piece so tiny, that it can only be seen under a microscope is a physical or chemical change?

Atoms that have charges are scientifically called?

The charge on a chloride ion in AlCl3 is?

This type of bond is where an electron is transferred from one atom to another making both atoms have a charge.

The bonds that occur when electrons are shared between atoms in a molecule are called _____________________ .

These bonds consist of the attraction of the “free floating” valence electrons for the positively charged metal ions. They are called ______________ bonds.

The elements most likely to form more than one type of ion are the

The sum of the neutrons and protons equals

Atoms that share electrons are held together by at least one _____________ .

A negatively charged ion is called?

A positively charged ion is called?

In a chemical reaction the substances that undergo change are called what?

In a chemical reaction the new substances formed as a result of a chemical change are called what?

What does the law of conservation of mass state?

Na has a 1+ charge. Cl has a 1– charge. What is the chemical formula?

Ca has a 2+ charge. Br has a 1- charge. What is the chemical formula?

What is the compound formula? Dinitrogen Pentaoxide

Compound formula? Copper II Sulfate

Compound formula? Aluminum Chloride

Compound name? NaCl

Compound name? H2O