7th Grade Chemistry

Chemical properties are

• an element’s ability to react with other elements.

• an element's ability to change into a gas.

• an elements attraction to water.

• any property which can be observed or measured.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is NOT true about the periodic table?

• Atomic mass is equal to the number of neutrons.

• Elements listed by their (increasing) atomic mass.

• Groups are the elements listed in columns.

• Periods are the elements listed in rows of 8 (for most rows).

The positive particle in an atom.

• proton

• neutron

• electron

• electron cloud

How many protons does Nitrogen have?

• 7

• 8

• 14

• 14.01

Tags

NGSS.MS-PS1-1

Which of the labeled structures is a neutron?

• a

• b

• c

Tags

NGSS.MS-PS1-1

The negative particle in an atom.

• proton

• neutron

• electron

The neutral particle in an atom.

• proton

• neutron

• electron

If an element has an atomic number of 11 and a mass number of 23, how many neutrons does it have?

• 11

• 12

• 23

• 34

Which of the following particles is NOT found in an atom's nucleus?

• proton

• neutron

• electron

Physical properties....

• change the matter when studied

• can be observed and measured without changing the matter being studied

• include the ability to burn and rust

• are useless unless studied in a lab