8th Grade S1 Final Exam

Front

What is a chemical change?

Back

The formation of a new substance with different properties; cannot be undone by physical means.

Front

What part of the atom is the neutron?

Back

A subatomic particle found in the nucleus of an atom, with no electric charge.

Front

How many neutrons does Chlorine (Cl) have if its atomic number is 17 and atomic mass is 35?

Back

18 neutrons.

Front

What does the atomic number represent?

Back

The number of protons in an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What are balanced forces?

Back

Forces that are equal in size and opposite in direction, resulting in no change in motion.

Front

What is constant speed?

Back

When an object covers equal distances in equal intervals of time.

Front

What is an unbalanced force?

Back

Forces that are not equal and opposite, causing a change in motion.

Front

What is a chemical reaction?

Back

A process that leads to the transformation of one set of chemical substances to another.

Front

What is a chemical formula?

Back

A way of expressing information about the proportions of atoms that constitute a particular chemical compound.