Chemistry--Unit 2, Lessons 5-7

Which is true of a valence level?

• It is the outermost energy level of an atom or ion

• The electrons in this level are most likely ro interact with other particles

• The electrons in this level can form bonds to stabilize the atom

• It is never full

• It is always full

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

In the periodic table, the group/family

• has elements with the same number of energy levels.

• is the vertical column.

• is the horizontal row.

• has elements with the same number of valence electrons

• has elements with dissimilar properties

In the periodic table, the series/period

• have elements with the same number of valence electrons

• is also called a family

• is a horizontal row

• is a vertical column

• have elements with the same number of energy levels

How many electrons made the first energy level stable?

How many electrons made the second, third, etc. energy level stable?

Tags

NGSS.HS-PS1-1

Which describe a Bohr model?

• 
• 
• Show all energy levels

• Accurately show the number of electrons in each level

• One dot represents one valence electron

Tags

NGSS.MS-PS1-1

Which describe a Lewis dot diagram?

• 
• 
• Show all energy levels

• Show only the outermost energy level (valence)

• One dot represents one valence electron

What must be true to make a neutral element?

• The number of protons and neutrons must be the same.

• It has to have more neutrons than protons.

• It needs to have more neutrons than electrons.

• The number of neutrons and electrons must be the same.

What determines the element?

• The number of protons

• The number of neutrons

• The number of protons and electrons added together

• The number of electrons

What are isotopes?

• Atoms of the same element but with different numbers of neutrons

• Atoms of the same element but with different numbers of electrons

• Atoms of different elements with the same number of neutrons

• Atoms of different elements with the same numbers of electrons