ILS Review Chemistry

When you take a water bottle out of the freezer the solid melts into a liquid. This is an example of a _____ change.

• physiclal

• chemical

• both physical and chemical change

• neither

Tags

NGSS.MS-PS1-4

Which element is least likely to conduct heat and electricity? (Use periodic table)

• Ca

• O

• Po

• Si

This picture is a model of a..

• element

• compound

• heterogeneous mixture

• homogeneous mixture

Tags

NGSS.MS-PS1-1

Chemical properties are

• properties that can be observed without changing the identity of the substance
• properties that describe how a substance changes into a completely different substance
• properties that we can only observe with our eyes
• properties that we need special tools to observe

How many total atoms are in this compound?

H₅C₂O₈N₅

• 5

• 23

• 15

• 20

Tags

NGSS.MS-PS1-1

Describe the accuracy and precision of the image

• Accurate and precise

• Accurate but not precise

• Not accurate but precise

• Not accurate and not precise

If there is no subscript, there is/are ______ atom(s) of that element.

• 0
• 2
• only 1
• 1 million

Tags

NGSS.MS-PS1-1

In a stable (neutral) atom, the total number of protons is equal to the number of __________________.

• neutrons

• electrons

• atomic mass

• neutrons + protons

Tags

NGSS.MS-PS1-1

What is the measurement of water in the beaker?

• 47 mL

• 50 mL

• 40 mL

• 57 mL

This image is a model of...

• an element

• a compound

• a homogenous mixture

• a heterogeneous mixture

Tags

NGSS.MS-PS1-1