Atoms and Elements

An element is ...

• a material made of many different things

• a material made of one type of atom

• a material made of 2 atoms

• there's no such thing

Tags

NGSS.MS-PS1-1

Si has an atomic mass of ___

• 28

• 14

• 15

• 0

Tags

NGSS.MS-PS1-1

How many protons does Te have?

• 127.60

• 127

• 52

• Te

Tags

NGSS.MS-PS1-1

What is the atomic number of Si?

• 28

• 14

• 15

• 0

Tags

NGSS.MS-PS1-1

For this element, the symbol is ...

• 6

• Carbon

• 12

• C

Tags

NGSS.MS-PS1-1

For this element, 6 is the __________.

• Atomic Number

• Atomic Mass

• Symbol

• Name

Tags

NGSS.MS-PS1-1

How many electrons does an oxygen atom have?

• 15.999

• 16

• 8

Tags

NGSS.MS-PS1-1

The number of protons and the number of electrons is the same.

• True

• False

The atomic mass comes from the nucleus of the atom. Which equation is right to find the atomic mass?

• Mass = Electrons

• Mass = Electrons + Protons

• Mass = Protons + Neutrons

• Mass = Protons - Nucleus

Tags

NGSS.MS-PS1-1

I have 50 protons. What element am I?

• In

• Sn

• Cl

• Hg