Grade 9 Chemistry Review

Protons and electrons are found in the nucleus of an atom

Who discovered the proton?

A chemical change can be easily reversed

What specific classification of matter is made up of two or more elements

describes how a substance reacts with oxygen

What subatomic particle is so small the mass is negligible

What element is represented by the Bohr-Rutherford diagram for an ion below?

the ability of a substance to dissolve in water

If an atom loses electrons, we call it this type of ion:

What type of property describes the behaviour of a substance as it becomes a new substance

How many electrons can each orbit hold beyond the 1st orbit

An ionic compound is made up of two non-metals

When writing a chemical equation, the products are written on the left side of the arrow

What value do we use to find the number of protons and electrons?

In ionic compounds, the metal and non-metal form a bond by transferring electrons

If an atom gains electrons, it will have this charge:

Which of the following is NOT part of the particle theory of matter?

Who discovered the neutron?

Which of the following is NOT a sign of a chemical change?

An ion is a neutral (has no charge)

When writing the standard atomic notation, you write the element symbol with the mass at the top and atomic number below

the ability to be drawn into long thin wires

What is the specific name we use when discussing molecular compounds made of TWO of the SAME atom?

What chemical family is the most reactive non-metal?

To find the number of neutrons, you subtract the atomic number from the atomic mass

The number of protons and neutrons in an atom are always the same

The more electrons an atom has, the more stable it becomes

What element is represented by the Bohr-Rutherford diagram below?

Diamonds are the hardest substance (meaning it cannot be scratched or dented)

What element is represented by the Bohr-Rutherford diagram below?

How many hydrogen atoms are in the following molecule: 4 Al(OH)₃

A physical change is a change in state or shape (nothing new is being formed)

How many oxygen atoms are in the following molecule: 2 Pb(NO₃)₂

What is the name of a compound that consists of two different non-metals?

the ability of a substance to allow electric current to pass through it

Who discovered the electron?

What chemical family is the most reactive metal?

What type of property gives a description of the characteristics of a substance