Reactivity in Groups and Periods

Four students were asked to name the parts of an atom that determine the atom’s chemical properties. The students’ responses are shown in the table below. Which student’s responses are correct?

• Student 1

• Student 2

• Student 3

• Student 4

Tags

NGSS.MS-PS1-1

How can you tell if 2 elements are from the same periods on the periodic table of elements?

• They are from the same periods if they have the same number of valence electrons

• They are from the same period if they are in the same horizontal row.

• They are from the same periods if they have they react similarly

• They are from the same periods if they have similar chemical properties

Which atomic diagram is considered to be a nonmetal, nonreactive, and a gas?

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

How can you tell if 2 elements are from the same group?

• They have the same number of energy levels or shells

• They are aligned horizontally in the periodic table

• They have similar chemical and physical properties

• none of these

Which elements in the picture are more similar in physical and chemical properties?

• Boron (B) and Silicon (Si)

• Aluminum (Al) and Carbon (C)

• Carbon (C) and Silicon (Si)

• Boron (B) and Carbon (C)

Elements found in which shaded area of the Periodic Table undergo the fewest chemical reactions?

• Q

• R

• S

• T

What happens to reactivity down a metal group?

• increases

• decreases

• does not change

• It's unpredictable

Which elements in the picture are in the same period?

• Fluorine (F) and Chlorine (Cl)

• Chlorine (Cl) and Neon (Ne)

• Neon (Ne) and Argon (Ar)

• Fluorine (F) and Neon (Ne)

Which of the following is true regarding reactivity?

• Transition metals are more reactive than group 1.

• Group 1 is more reactive than the transition metals.

• Group 18 is the most reactive.

• Hydrogen will never react.

What gives elements in a group or family similar properties?

• energy levels

• mass number

• valence electrons

• atomic number