Molecules Mini Assessment

What are the most basic building blocks for all matter?

• atoms
• compounds
• elements
• molecules

What do we call substances consisting of a single type of atom?

• atoms
• elements
• molecules
• compounds

All ________________ are made up of two or more atoms (they may be the same or different kinds).

• atoms
• compounds
• elements
• molecules

A(n) __________________ is made up of two or more DIFFERENT kind of atoms.

• atom
• compound
• element
• molecule

The chemical formula tells which types of atoms and how many of each are in a substance.

• True
• False

This part of a chemical formula tells how many atoms of each element are present in a molecule:

• element symbol
• subscript (the small number after the element symbol)
• coefficient (the number in front of the molecule)
• molecule

This part of a chemical formula tells how many molecules there are:

• element symbol
• subscript (the small number after the element symbol)
• coefficient (the number in front of the molecule)
• molecule

Identify the correct answer:

• N (nitrogen) is an element, but H₂O (water) is a molecule

• N (nitrogen) is an molecule, but H₂O (water) is an element

• Both N (nitrogen) and H₂O (water) are elements

• Both N (nitrogen) and H₂O (water) are molecules

The molecule NH₃ (ammonia) has how many atoms of N (nitrogen) and H (hydrogen) each?

• 3 atoms of N and 3 atoms of H

• 3 atoms of N and 1 atom of H

• 1 atom of N and 1 atom of H

• 1 atom of N and 3 atoms of H