Unit 2 Chemistry

How many significant figures does .00670 have?

• 5

• 4

• 3

• 2

How would the following number be written in scientific notation .0000067

• 67 X 10⁶

• 6 x 10^-6

• 7 x 10^-7

• 6.7 x 10^-6

Which of the following is a physical change

• Melting Ice

• Burning Wood

• Breaking water into hydrogen and oxygen

• Eating food to give us energy

Tags

NGSS.MS-PS1-2

Which of the following is not a physical property

• Texture

• Size

• Hardness

• Rusting

Rusty Metal is this type of change

• Chemical

• Physical

• Emotional

• Economical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The formula for density is

• D = M/V

• D= V/M

• D= M+V

• D=V-M

An atom is

• any small simple particle

• a small unit particle of an element

• a small unit particle of a compound

• a molecule

Tags

NGSS.MS-PS1-1

Found in the nucleus of an atom. This particle has a positive charge.

• Neutron

• Proton

• Electron

• Decepticon

Found orbiting outside the nucleus, this subatomic particle has a negative charge.

• Neutron

• Proton

• Electron

• Idontknowatron

The atomic number will always be the same as

• Mass number and number of protons

• Number of neutrons and protons

• number of electrons and protons

• Number of electrons and neutrons