Midterm Review

Which particle in the atom is + charged? ____________

• nucleus

• neutron

• electron

• proton

Which particle in the atom is - charged? ____________

• proton

• neutron

• electron

• nucleus

Which particle in the atom has no charge?

• neutron
• electron

• proton

• nucleus

Elements are pure substances made of 1 kind of atom, found on the ___________________________ of elements.

• periodic table
• electromagnetic spectrum

• HR diagram

• kitchen table

___________ are substances made of more than 1 kind of atom, such as water or sand.

• compounds
• elements

• mixtures

• reactions

Tags

NGSS.MS-PS1-1

___________ are substances made of ONLY ONE KIND of atom.

• compounds

• elements

• homogeneous

• mixtures

Substances that come out of a chemical reaction (they are produced) are called ____________________.

• reactants

• products

• yields

• reacts

Tags

NGSS.MS-PS1-2

Substances that go into a chemical reaction are called ____________________

• products

• reactants

• yields

• substances

Tags

NGSS.MS-PS1-5

In a chemical reaction (like the one shown above) atoms are never created or destroyed, just rearranged. Therefore, the mass of the reactants is _______________ to the mass of the products, and the number of atoms of each element is the same on the reactant and product sides.

• • sometimes more than

• less than

• greater than

• equal

Tags

NGSS.MS-PS1-5

In the chemical reaction above, if 40 grams of methane (CH₄) reacts with 30 grams of Oxygen gas (O₂) then what will be the total mass of the products?

• 40 g

• 20 g

• 70 g

• 30 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5