Chemistry

The group number tells us how many _________ there are in an element.

• groups
• valence electrons
• energy levels
• chemicals

Tags

NGSS.HS-PS1-1

The ________________ tells you how many energy levels are used in an element.

• group number
• atom
• protons
• period number

The element Tellurium has the atomic mass of 127.60 and its atomic number is 52. How many neutrons are in the element Tellurium?

• 179.60
• 127.60
• 52
• 76

Tags

NGSS.HS-PS1-8

The inner energy level can only hold ______ electrons.

• 1
• 0
• 2
• 18

The largest amount of electrons the 3rd energy level can hold is?

• 18
• unlimited amount
• 2
• 8

The characteristics or properties of metals include

• shiny and solid
• ductile and malleable
• lose electrons
• all of the above

True or False - An energy level has to be full before moving on to the next energy level?

• true
• false

How many valence electrons do elements in group 17 have in their outer energy level?

• 7
• 17
• 1
• 0

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

^{_{Is the Bohr Model for the element Selenium (Se) correct?}}

• yes
• no

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

^{_{Is this a correct representation of the Bohr Model for Sodium (Na)?}}

• no
• yes

Tags

NGSS.HS-PS1-1