1.1 ATOM AND MOLECULES

The relative molecular mass of a compound is equal to the sum of its

• Atomic mass
• Atomic number
• Oxidation number
• Valence electrons

What is the relative atomic mass of sodium?

• 11
• 23
• 46
• 64

What is the unit of relative molecular mass?

• kilogram
• gram
• gram per mole (g/mol)
• no units

The relative atomic mass is the average mass of an atom compared to 

• the mass of a carbon-12 atom.
• 1/12 the mass of a carbon-12 atom
• the mass of a hydrogen atom
• 1/12 the mass of a hydrogen atom

Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?

• Nitrogen-13
• Nitrogen-14
• Nitrogen-15
• Based on the information given, it cannot be determined

Elements are made of 

• many types of atoms 
• the periodic table
• one type of atom 
• molecules 

Tags

NGSS.MS-PS1-1

All matter is made of 

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

What are the 3 particles that make-up the atom?

• protons, neutrons, and isotopes
• neutrons, isotopes, and electrons
• positives, negatives, and electrons
• protons, neutrons, and electrons

Tags

NGSS.MS-PS1-1

What part of an atom is NEGATIVELY charged?

• protons
• neutrons
• electrons
• atoms

What is the term for combining 2 or more atoms together?

• atoms
• elements
• molecules
• compounds