Compounds, Elements, Periodic Table

Water is an example of a(n) 

• element 
• compound 

Tags

NGSS.MS-PS1-1

What is a substance that is made of only one atom?

• element

• solution

• compound

Carbon and oxygen combine chemically to form carbon dioxide. Carbon dioxide is

• an ion

• a nucleus

• a compound

• an atom

Tags

NGSS.MS-PS1-1

2 atoms of hydrogen and 1 atom of oxygen combine to form water. What is the chemical formula for water?

• H₂O

• H₂O₂

• HO₂

Tags

NGSS.MS-PS1-1

Subscripts are used to identify the number of atoms in a compound. How many atoms of carbon are in C₆H₈O₆? (Better known as Vitamin C.)

• 8

• 6

• 12

• 20

Tags

NGSS.MS-PS1-1

Hydrogen Peroxide has a chemical formula of H₂O₂. Which atoms make up this compound?

• 2 atoms of hydrogen and 1 atom of oxygen

• 1 atom of hydrogen and 2 atoms of oxygen

• 2 atoms of hydrogen and 2 atoms of oxygen

Tags

NGSS.MS-PS1-1

The smallest particles of an element that still have the element’s properties are

• quarks
• gluons
• protons
• atoms

Which statement is true about the nucleus of an atom?

• It makes up most of the atom’s volume
• It makes up most of the atom’s mass
• It contains protons and electrons
• It is neutral in electric charge

The mass number of an atom is its number of

• electrons
• protons
• neutrons
• protons + neutrons

When a fluorine atom gains an electron, it becomes a(n)

• positive ion
• negative ion
• isotope
• atom