Counting Atoms: A Doodlecast Exploration

What does a subscript next to an element symbol indicate?

• Number of compounds

• Number of molecules

• Number of protons

• Number of atoms of the element

If there is no subscript written next to an element, how many atoms of that element are present?

• Two

• One

• It's variable

• Zero

Tags

NGSS.MS-PS1-1

What does the subscript '3' in 'AlF3' indicate?

• Three fluorine atoms

• Three aluminum atoms

• Three compounds

• Three molecules

Tags

NGSS.MS-PS1-1

What role do coefficients play in determining the number of atoms in a compound?

• They are used for balancing equations

• They reduce the number of atoms

• They multiply the number of each atom indicated by subscripts

• They indicate the charge of the compound

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

In the compound '2 CaBr2', how many bromine atoms are present?

• Eight

• Two

• Six

• Four

Tags

NGSS.MS-PS1-1

How many oxygen atoms are there in '3 Na2O'?

• Six

• Nine

• Three

• Twelve

If a compound has a coefficient of 3 and a subscript of 2 for sodium, how many sodium atoms are there?

• Six

• Two

• Three

• Five

Tags

NGSS.MS-PS1-1

In a compound with the formula 'Ca(NO3)2', how many nitrogen atoms are present?

• Six

• Four

• Two

• One

Tags

NGSS.MS-PS1-1

How many total atoms are there in 'Ca(NO3)2'?

• Twelve

• Nine

• Five

• Three

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is the next topic to learn after understanding subscripts and coefficients?

• Balancing chemical equations

• Quantum mechanics

• Organic chemistry

• Electrochemistry

Tags

NGSS.MS-PS1-5