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Bellringer for Friday 5-22-20

Last updated over 5 years ago

2 questions

1

1

Question 1

1.

An atom has 30 protons, 30 neutrons, and 30 electrons. What is the charge of the atom’s nucleus?

a  +30 

b  +60 

c  -30 

d  +90

Question 2

2.

The picture below shows the sodium atom. Sodium is a highly reactive metal.
Which characteristic of sodium is most closely related to its chemical reactivity?

f  The 11 electrons in each atom of sodium 

g  The density of sodium which is 0.971 g/cm3 

h  The atomic mass of sodium, which is 22.98 amu 

j The 1 valence electron in each atom of sodium