Formulae and Equations - 1

What is an element?

• A substance made up of different types of atoms

• A substance made up of atoms of only one element

• A substance made up of atoms

• A substance made up of atoms of more than one different element that are chemically bonded together

What is a compound?

• A substance made up of different types of atoms

• A substance made up of atoms of only one element

• A substance made up of atoms

• A substance made up of atoms of more than one different element that are chemically bonded together

What name is given to a molecule formed from 2 atoms that are chemically bonded together?

• two-atom

• di-atom

• double molecule

• diatomic

Which of these elements exists as diatomic molecules?

• sodium

• carbon

• neon

• nitrogen

Which of these elements does NOT exist as diatomic molecules?

• oxygen

• argon

• chlorine

• iodine

What is the correct formula for the element sodium?

• S

• So

• Na₂

• Na

What is the correct formula for the element fluorine?

• F₂

• F

• Fl

• Fl₂

What is the correct formula for the element hydrogen?

• Hy

• H₂

• H

• Hy₂

What is the correct formula for the element iron?

• I

• Ir

• Fe

• Fe₂

What would you call a compound that contained these elements: calcium and bromine