Element - a pure substance that ​ (a)   be ​ (b)   down into a ​ (c)   substance

• cannot
• broken
• simpler
• can
• built
• bigger

​ The building blocks of matter

• Elements
• Molecules

• Compounds

• Electrons

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Elements are represented by a ​ (a)  

• symbol
• formula
• 1 letter
• chart

There are how many known elements?

Atoms are the ​ (a)   particles of a/an ​ (b)  

• smallest
• element
• largest
• molecule
• matter
• only

Tags

NGSS.MS-PS1-1

Label the isotopes of an atom with its correct charge

f

g

h

Nucleus

Electrons

Isotope

Proton

hydrogen

Shell

Energy

Neutron

Tags

NGSS.MS-PS1-1

Compounds have _____ elements that are _____ combined

• 2 or more

  chemically

• 1

  physically

• 2 or more

  physically

• 1

  chemically

True or False: Compounds have properties that are the same as the elements that make them

• True

• False

Which of the following represents a chemical formula? (more than 1 answer, select all that work)

• H

• H4

• H2O

• CO2

Tags

NGSS.MS-PS1-1

How well do you feel you understand this week's content?

• Totally Lost :(

• Okay but need more practice to remember

• I feel pretty good about it

• I could teach it to someone else

Tags

NGSS.HS-LS3-1