7th Grade Semester Test

What is the smallest particle of an element that still retains the properties of that element?

• proton

• molecule

• atom

• cell

Tags

NGSS.MS-PS1-1

What are the three subatomic particles that make up an atom?

• Photons, Neutrons, Electrons

• Protons, Neutrons, Positrons

• Protons, Electrons, Neutrinos

• Protons, Neutrons, Electrons

Tags

NGSS.MS-PS1-1

What is the chemical formula for water?

• CH4

• NaCl

• CO2

• H2O

Tags

NGSS.MS-PS1-1

What is the law of conservation of mass in a chemical reaction?

• Matter is created and destroyed in a chemical reaction

• Matter is neither created nor destroyed, it only changes form.

• Matter can be destroyed but not created in a chemical reaction

• Matter can be created but not destroyed in a chemical reaction

Tags

NGSS.MS-PS1-5

What is the atomic number of carbon?

• 8

• 6

• 12

• 3

What is the symbol for the element with atomic number 8?

• O

• He

• H

• C

What happens to the number of atoms during a chemical reaction?

• Remains constant

• Increases by 10%

• Doubles

• Becomes zero

Tags

NGSS.MS-PS1-5

What is the name of the element with atomic number 1?

• Hydrogen

• Helium

• Oxygen

• Carbon

What is the chemical symbol for the element Sodium?

• Na

• S

• So

• N

What is the atomic number of the element Oxygen?

• 6

• 8

• 10

• 12