Chemistry

What is a substance that is composed of only one type of atom?

• molecule

• element

• compound

• ionic compound

Which of the following particles has a negative charge?

• proton

• neutron

• electron

Which of the following is a compound made up of molecules?

• ionic compound

• mixture

• molecular compound

What is the study of what substances are made of and how one substance can be changed into another called?

• chemistry

• halogens

• noble gases

• periodic table

Which of the following terms means "lacking an electrical charge"?

• positive

• neutral

• shell

• electron

The atomic number indicates what?

• the number of protons an atom has

• the number of electrons an atom has

• the number in the electron cloud

• the shell number

What is the most abundant element at the surface of the earth?

• hydrogen

• chlorine

• oxygen

• halogen

The organized arrangement of all known elements is called what?

• periodic table of elements

• noble gases

• halogens

• semi-metals

What is the rapid reaction of any substance with oxygen called?

• ionic compoud

• combustion

• chemical reaction

• repel

Which substance is known for being the hardest?

• nickel

• zinc

• diamond

• fluorine