Unit 2 - Matter - Review - Demoratz

In the image, what part of the atom is the green dot?

• Proton

• Neutron

• Electron

Answer explanation

Proton has 1 AMU mass and no charge

Tags

NGSS.MS-PS1-1

In neutral atom, the number of electrons equals what other part?

• Proton

• Neutron

Answer explanation

Is there are more electrons than protons, then it's a negative ion. Less electrons than protons is a positive ion.

Tags

NGSS.MS-PS1-1

Which of the following statements describe what happens during a chemical change?

• The total number of atoms changes.

• Atoms break bonds and new molecules are formed.

• Atoms remained attached to the same atoms.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the product in this reaction?

• CH4 and O2

• CO2 and H2O

Answer explanation

Reactants become products in an equation.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of an exothermic chemical reaction?

• photosynthesis

• burning wood

• melting ice cubes

• boiling water

Answer explanation

Photosynthesis is endothermic as it takes in the heat energy from the sun and cools it down for the plants.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What is the atomic number of this atom?

• 1

• 5

• 10

• 15

Answer explanation

You get the atomic number from the number of protons.

Tags

NGSS.MS-PS1-1

What would the atomic mass of this atom be?

• 1

• 5

• 10

• 15

Answer explanation

Protons and Neutrons weigh one each, so there are 10, so the atomic weight is 10.

Tags

NGSS.MS-PS1-1

What are the subatomic particles?

• Protons, Electrons, Neutrons

• Molecules, and atoms

• Electrons, Protons, Nucleus

• Nucleus, and Electrons

Tags

NGSS.MS-PS1-1

What is this subatomic particle that has positive charge?

• Electron

• Neutron

• Proton

• Megatron

What mass does a neutron have?

• 1 amu

• 0 amu

• -1 amu

• +2 amu