P

Which is a compound?

• N2

• Ne

• NH3

Tags

NGSS.MS-PS1-1

How does the zig-zag (staircase) line on the periodic table help indicate properties of elements?

• Elements located on the left of the zig-zag line are liquids at room temperature.

• Elements located on the right of the zig-zag line are liquids at room temperature.

• Elements located on the left of the zig-zag line are good conductors of heat and electricity.

Which is true about a compound?

• It is made up of one type of atom.

• It is a pure substance containing elements that are chemically combined.

• It can be changed into simpler substances through a physical change.

Tags

NGSS.MS-PS1-1

Which conclusion can be made about calcium and magnesium in the same group on the periodic table?

• They are both reactive metals.

• They both have complete outer shells

• They are both semi-conductors of heat and electricity.

Can a phase change produce new compounds?

• No, because physical changes occur.

• No, because chemical changes occur.

• Yes, because atoms can bond together to form new substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

In which state of matter will the atoms of an element be tightly packed together?

• gas

• liquid

• solid

Which could best be separated into simpler substances by filtration and evaporation?

• atom

• mixture

• element

Which best describes a heterogeneous mixture?

• It contains only one type of atom.

• It contains two or more types of particles which are easily distinguished.

• It is composed of two or more substances in which particles are evenly blended.

What is the smallest unit of an element that retains the properties of that element?

• electron

• molecule

• atom

Where are the most reactive metals located on the periodic table?

• the uppermost complete row of the table

• the rows at the bottom of the table connecting two section

• the column at the far left side of the table