The Atom and Intro to Periodic Table

Which statement is true about the electron?

• It has the same mass as the proton and it is negatively charged

• It has the same mass as the proton and it is positively charged

• It is the lightest subatomic particle and it is negatively charged

• It is the lightest subatomic particle and it is positively charged

Tags

NGSS.MS-PS2-3

Which statement is true about the nucleus of an atom?

• It is where there are electrons and neutrons.

• It is where there are electrons and protons.

• It is where there are neutrons and protons.

• It is where there are protons only.

Most of the atom is empty space.

• False

• True

Why are all elements on the Periodic Table neutral?

• number of electrons = number of neutrons

• number of electrons = number of protons

• number of neutrons = number of protons

• number of electrons = number of neutrons = number of protons

Label the different parts of the following element found in the Periodic Table.

(This question is worth 2 points!!)

a

d

c

b

Element

Mass Number

Atomic Number

Symbol

Tags

NGSS.MS-PS1-1

How many neutrons does this atom of aluminium have?

• 13

• 14

• 27

• 40

Tags

NGSS.MS-PS1-1

What is the maximum number of electrons that can be found in the first shell?

• 1

• 2

• 8

• 18

An atom of phosphorus is shown.

How many electrons does it have and what is its electronic configuration?

• 15 electrons

  2,8,5

• 15 electrons

  8,7

• 16 electrons

  2,8,6

• 31 electrons

  2,8,8,8,5

Tags

NGSS.MS-PS1-1

Read the following sentences:

Element X has 22 protons.

It also has 26 neutrons.

The name of the elements is ​ (a)   . It has a atomic number of ​ (b)   and a mass number of ​ (c)   .

You may use a Periodic Table to help you.

• titanium
• 22
• 48
• 26
• 4
• iron
• cadmium
• berrylium

Tags

NGSS.MS-PS1-1