Second Semester Chemistry Midterm

What is one way matter change states?

• matter loses mass
• heat is added
• it doesn't change
• by doing nothing

Tags

NGSS.MS-PS1-4

The amount of space that matter takes up is its _______.

• atom
• volume
• matter
• weight

The amount of matter something contains is its ______________.

• gas
• solid
• weight
• mass

Tags

NGSS.HS-PS1-7

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

• 15
• 31
• 16
• 47

An atom has an atomic number of 19 and a mass number of 29. How many neutrons are in the atom?

• 30
• 19
• 10
• 38

What carries no charge 

• Neutrons
• Electrons
• Protons

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 
• Subscript
• Atom
• Equation

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

Tags

NGSS.HS-PS1-7

In a chemical equation, is it true that -

• the reactant side and product side can have different numbers of atoms for each element
• there can be different elements on the reactant side and the product side
• an element or compound must be accompanied by a phase change
• the coefficients indicate the number of molecules of each reactant used and the number of molecules of each product made

Tags

NGSS.HS-PS1-7

According to the law of conservation of mass...

• sometimes atoms are lost
• sometimes atoms are gained
• atoms are never lost nor gained
• atoms are lost and gained

Tags

NGSS.HS-PS1-7