Purposeful Design Science Level 6 Chapter 5 Review

What is the maximum amount of electrons that fit in the first electron energy level

• three

• two

• six

• eight

What does the amount of valance electrons determine about an element?

• Its row in the table.

• Its atomic number.

• Its atomic mass.

• Its reactivity with other elements.

If Se has an atomic number of 34 and an atomic mass of 79, select all the statements that are true about it

• Se has 79 electrons

• Se has 34 electrons

• Se has 1 electron in the first energy level

• Se has 45 neutrons

• Se has 2 electrons in the first electron energy level

Select the one that states what goes in the blanks

The force of __________ between positively charged protons is overcome by the __________ force made by the presence of the neutrons in the nucleus of an atom

• repulsion, power

• attraction, strong

• repulsion, strong

• attraction, resistance

Select all the right answers

An atom of sodium with an atomic number of 11 has

• 4 electrons in the first energy level

• 1 electron in the last energy level

• 2 electrons in the first energy level

• 7 electrons in the second energy level

• 8 electrons in the second energy level

The # of protons = the # of ________

• neutrons

• electrons

• electron energy levels

• the electrostatic charge power

(a)   = the # of protons plus neutrons

What kind of electrons are represented as dots in an electron dot diagram

(a)  

What represents valence electrons as dots

(a)  

which came first, structure or properties

• structure came first

• properties came first

• they came at the same tied

• they are identical