Atoms and Elements

What is one way Neutrons are different from electrons?

• they both are negative

• neutrons have no charge, while electrons have a negative charge

• Both are in the nucleus( center of atom)

• Electrons are inside nucleus and neutrons are outside the nucleus.

Tags

HS-PS1-A-1

Match the Following

• The smallest unit of an element that keeps the element’s chemical properties.

• Nucleus

• Particles with a neutral charge found in the nucleus of an atom.

• Proton

• The dense center of an atom containing protons and neutrons.

• Neutron

• Positively charged particles found in the nucleus of an atom.

• Atom

• A substance that cannot be broken down into simpler substances by physical or chemical means.

• Element

Tags

HS-PS1-A-1

How many Hydrogen atoms are in 4 H₂O? ​ (a)   How many oxygen atoms? ​ (b)  

• 8
• 4
• 1
• 2
• 3
• 5
• 6
• 7
• 9

Tags

NGSS.MS-PS1-1

How many O's are in Al₂(SO₄)₃

Tags

NGSS.MS-PS1-1

How many elements are in 2 C₆H₁₂O₇? (a)  

How many C: ​ (b)  

How many H: ​ (c)  

How many O: ​ (d)  

How many TOTAL atoms: ​ (e)  

• 3
• 12
• 24
• 14
• 50
• 7
• 6
• 25
• 52
• 60

Tags

NGSS.MS-PS1-1

Match the element to the number of atoms it has.

2 Al(C₂H₃O₄)₂

• 8

• hydrogen

• 16

• oxygen

• 2

• carbon

• 12

• aluminum

Tags

NGSS.MS-PS1-1

• Iron, Oxygen

• Francium, Europium, Oxygen

• Ferrium, Oxygen

• Berylium, Oxygen

Tags

NGSS.MS-PS1-1

• 4

• 3

• 2

• 6

Tags

NGSS.MS-PS1-1