Periodicity Test

1. What does the periodic law state?

• A) Elements are arranged by increasing atomic mass.

• B) Elements are arranged by increasing atomic number.

• Elements are arranged by atomic radius.

•  Elements are arranged alphabetically.

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

2. Which group contains the alkali metals?

• A) Group 2

• B) Group 1

• C) Group 17

• D) Group 18

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NGSS.HS-PS1-1

3. Elements in the same group share similar:

• A) Atomic numbers.

• B) Reactivity trends.

• C) Number of valence electrons.

• D) Atomic masses.

4. Which element is a noble gas?

• A) Oxygen

• B) Helium

• C) Chlorine

• D) Potassium

Tags

NGSS.HS-PS1-1

5. Which statement is true about metals?

• A) Metals are poor conductors of electricity.

• B) Metals are brittle.

• C) Metals tend to lose electrons in reactions.

• D) Metals have high ionization energy.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

6. The atomic radius decreases across a period because:

• A) The number of energy levels increases.

• B) The nuclear charge increases, pulling electrons closer.

• C) The number of valence electrons decreases.

• D) Electronegativity decreases.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

7. Halogens are located in:

• A) Group 1

• B) Group 2

• C) Group 17

• D) Group 18

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NGSS.HS-PS1-1

8. An atom of which element has the largest radius?

• A) Fe

• B) Mg

• C) Si

• D) Zn

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NGSS.HS-PS1-1

9. Which of these is a metalloid?

• A) Silicon

• B) Sulfur

• C) Sodium

• D) Argon

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NGSS.HS-PS1-1

10. Electronegativity increases across a period because:

• A) Atomic mass increases.

• B) Shielding effect decreases.

• C) Nuclear charge increases, attracting electrons more strongly.

• D) The atomic radius increases.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2