Week 1.5 Test

1. Which THREE elements have similar chemical properties to Chlorine (Cl)?

• Fluorine, F

• Argon, Ar

• Iodine, I

• Sulfur, S

• Bromine, Br

In the model of the atom shown, which particle determines the reactivity of this atom?

• W

• X

• Y

• Z

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NGSS.MS-PS1-1

A student drew atomic models of 4 different elements. 

Based on these drawings, which element is LEAST reactive?

• Neon, because it has two energy levels with eight electrons in the second level.

• Chlorine, because it has three energy levels with seven electrons in the third level.

• Gallium, because it has four energy levels with three electrons in the fourth level.

• Tin, because it has five energy levels with four electrons in the fifth level.

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NGSS.MS-PS1-1

Based on the information on the table, which conclusion about the chemical reactivity of these elements is valid?

• Boron is most reactive because it has the most protons.

• Fluorine is the most reactive because it has 7 electrons in its outer shell.

• Silicon is the most reactive because it has an equal number of protons and neutrons.

• Gallium is the most reactive because it has many more neutrons than protons.

Which element in PERIOD 4 would be considered one of the most highly reactive metals?

• Krypton (Kr)

• Potassium (K)

• Calcium (Ca)

• Bromine (Br)

Which element in period 4 would be considered stable, inert, and not reactive?

• Krypton (Kr)

• Potassium (K)

• Calcium (Ca)

• Bromine (Br)

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NGSS.MS-PS1-1

Which statement correctly describes the location and charge of an electron in an atom?

• The electrons are inside the nucleus and have no charge.

• The electrons are outside the nucleus and have no charge.

• The electrons are outside the nucleus and have a negative charge.

• The electrons are inside the nucleus and have a negative charge.

Students were discussing the structure of an atom. They were describing the two locations and the charges they are associated with. 

Which student was correct about the location and charge?

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NGSS.MS-PS1-1

10. Which TWO elements have 12 neutrons?

• Ca (Calcium)

• Na (Sodium)

• Beryllium (Be)

• Magnesium (Mg)

The atomic number for Argon (Ar) is 18. If the atomic mass is 40, which table best describes the total amount of subatomic particles inside and outside the nucleus of atom of Argon?

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Tags

NGSS.MS-PS1-1