PS Fall Final

Wafting is a process used in science labs to observe

• color changes in a reaction.

• odors given by a reaction.

• if something is an acid or a base.

• flammability of a substance.

What is the name and the use of the lab equipment shown?

• Safety goggles - protects the eyes

• Beaker Tongs - removes hot test tubes, beakers off

• Bunsen Burner - warms liquids up

• Graduated Cylinder - measurement tool used to measure liquids precisely

After completing an experiment, all chemical wastes should be

• left at your lab station for the next class.

• disposed of according to your instructor's directions.

• poured down the sink.

• placed in the trash.

Tags

NGSS.MS-ESS3-4

What is the SI (metric) unit for volume?

• liter

• meter

• gram

• kelvin

An element with 12 protons, 11 neutrons, and 12 electrons has an atomic number of

• 12

• 11

• 3

• 23

Tags

NGSS.MS-PS1-1

An element with 12 protons, 11 neutrons and 12 electrons is _________.

• Sodium

• Magnesium

• Chromium

• Vanadium

Tags

NGSS.MS-PS1-1

A subatomic particle with a positive charge

• Electron Cloud

• Protons

• Electron

How many valence electrons are there for alkali metals?

• 1

• 7

• 2

• 8

What is the octet rule?

• when an atom has a full energy level

• when an atom is stable and unlikely to react

• when atoms bond through sharing or transferring electrons to have 8 valence electrons

• all of the above

Matter can be neither created nor destroyed

• True

• False

Tags

NGSS.MS-PS1-5