What's a valence electron?

electrons in the outermost energy level

electrons in the second energy level

In the periodic table hydrogen is placed in Group 1A and helium is placed in Group 8A. The most likely reason for this is:

Hydrogen has one outer shell electron and helium has a full outer shell of electrons.

Hydrogen has one outer shell electron and helium has 8 electrons in its outer shell.

Hydrogen and helium are both metals.

Hydrogen and helium are both gases.

Lithium is in Group 1A, Period 2 of the periodic table. Which statement describes the charge of the ion it typically forms?

It forms a cation with a +1 charge

It forms a cation with +2 charge.

It forms an anion with a +1 charge.

It forms an anion with a −1 charge.

Which of the following increases from top to bottom in the Alkaline Earth Metals?

number of valence (outer) electrons

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PT Test Review Quizzizz

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Chemistry, Science

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11th Grade

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Practice Problem

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Easy

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NGSS

HS-PS1-1, HS-PS1-2, MS-PS1-1

Standards-aligned

Tim Healy

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84 questions

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Sodium (Na) and potassium (K) are in the same group on the periodic table. Based on their locations, which statement about sodium and potassium is true?

Sodium is less electronegative than potassium.

Sodium has fewer energy levels than potassium.

Sodium has a larger ionic radius than potassium.

Sodium has lower ionization energy than potassium.

Tags

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Sodium (Na) and potassium (K) are in the same group on the periodic table. Based on their locations, which statement about sodium and potassium is true?

Sodium is less electronegative than potassium.

Sodium has fewer energy levels than potassium.

Sodium has a larger ionic radius than potassium.

Sodium has lower ionization energy than potassium.

Tags

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The Periodic Table of the Elements is useful for revealing patterns and trends in the elements. Which statement accurately describes a pattern in the size of atomic radii in the Periodic Table of the Elements?

Atomic radii decrease from left to right across a period and decrease from top to bottom in a group.

Atomic radii increase from left to right across a period and increase from top to bottom in a group.

Atomic radii decrease from left to right across a period and increase from top to bottom in a group.

Atomic radii increase from left to right across a period and decrease from top to bottom in a group.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which element is similar to B?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which element is similar to F?

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which element is the least reactive?

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An atom is made up of protons, neutrons, and electrons. Which is the smallest subatomic particle?

Proton

Neutron

Electron

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Sodium (Na) and potassium (K) are in the same group on the periodic table. Based on their locations, which statement about sodium and potassium is true?

Sodium (Na) and potassium (K) are in the same group on the periodic table. Based on their locations, which statement about sodium and potassium is true?

The Periodic Table of the Elements is useful for revealing patterns and trends in the elements. Which statement accurately describes a pattern in the size of atomic radii in the Periodic Table of the Elements?

Which element is similar to B?

Which element is similar to F?

Which element is the least reactive?

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