Compounds and Chemical Formulas

How many oxygens atoms ( O )atoms in a molecule of H₂O?

• 1

• 2

• 3

• 0

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NGSS.MS-PS1-1

The small number to the right of an elemental symbol  ( H₂₎ is called?

•  a subscript 

• a coefficient 

• a variable 

• a divisor 

A series of numbers and letters that are used to represent a molecule

• physcial property 

• chemical property 

• chemical formula 

• atom

Tags

NGSS.MS-PS1-1

TRUE OR FALSE:
Every compound is a molecule but not every molecule is a compound.

• TRUE

• FALSE

Tags

NGSS.MS-PS1-1

Which statement best describes the relationship between atoms & molecules.

• molecules are made of atoms that are bonded together.

• atoms are made of molecules.

• atoms are made of protons, neutrons & electrons.

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NGSS.MS-PS1-1

Which statement describes the model that shows a compound.

• Model X shows a compound because there are two different types of atoms

• Model X shows a compound because two different atoms are chemically bonded together.

• Model Y dhows a compound because there is more than one type of atom.

• Model Y shows a compound because each pair of matching atoms can form a chemical bond.

Tags

NGSS.MS-PS1-1

When a covalent bond forms _______________ are shared.

• protons

• nutrons

• valence electrons

• quarks

A ___________________ is the smallest unit of a compound.

• atom

• proton

• electron

• molecule

Tags

NGSS.MS-PS1-1

How many atoms of hydrogen are in a sugar molecule with the formula C₆H₁₂O₆

• 12

• 6

• 24

• 18

Tags

NGSS.MS-PS1-1

• Element

• Compound

• Mixture

Tags

NGSS.MS-PS1-1