The significance of valence electrons in chemical reactions is:

They determine the reactivity of an element.

They have no role in chemical reactions.

They are found in the nucleus of an atom.

They are responsible for the mass of an atom.

What is the valence electron configuration of Group 1 elements?

The valence electron configuration of Group 1 elements is ns¹, where n represents the principal quantum number.

The valence electron configuration of Group 1 elements is ns² np¹.

The valence electron configuration of Group 1 elements is ns² np².

The valence electron configuration of Group 1 elements is ns².

What is the valence electron configuration of Group 2 elements?

The valence electron configuration of Group 2 elements is ns², where n represents the principal quantum number.

The valence electron configuration of Group 2 elements is ns²np¹, where n represents the principal quantum number.

The valence electron configuration of Group 2 elements is ns²nd¹, where n represents the principal quantum number.

The valence electron configuration of Group 2 elements is ns²nf¹, where n represents the principal quantum number.

The periodic table shows patterns of valence electrons in groups and in periods. Which of the following best describes this pattern?

Valence electrons increase by one across a period and remain the same down a group.

Valence electrons remain the same across a period and increase by one down a group.

Valence electrons increase by two across a period and decrease by one down a group.

Valence electrons decrease by one across a period and remain the same down a group.

The periodic table has an odd shape because:

it reflects the periodic recurrence of elements' properties.

it is designed to fit on a single page.

it is arranged alphabetically by element names.

it is based on the order of discovery of elements.

The periodic table is divided into four distinct blocks because:

it reflects the electron configuration of elements.

it organizes elements by their atomic number.

it groups elements with similar chemical properties.

it separates metals from non-metals.

The p-block is comprised of which groups?

The p-block is comprised of groups 13 to 18 in the periodic table.

The p-block is comprised of groups 1 to 2 in the periodic table.

The p-block is comprised of groups 3 to 12 in the periodic table.

The p-block is comprised of groups 1 to 18 in the periodic table.

Why are there no p-block elements in period 1?

Because period 1 only contains hydrogen and helium, which are s-block elements.

Because period 1 elements have incomplete d-orbitals.

Because period 1 elements are all metals.

Because period 1 elements have a full p-orbital.

Why are the atoms of Group 18 elements considered stable?

They have filled s and p orbitals

They have incomplete electron shells

They undergo many chemical reactions

The 3d electrons are added in the fourth period because:

they have higher energy than 4s electrons.

they have lower energy than 4s electrons.

they are closer to the nucleus than 4s electrons.

they are further from the nucleus than 4s electrons.

What characterizes the elements in the f-block?

Filled or partially filled outermost s orbital and filled or partially filled 4f and 5f orbitals

Only filled outermost s orbital

The arrangement of elements into groups in the periodic table provides:

a systematic way to organize chemical elements.

a method to calculate atomic mass.

5.2: Classification of the Elements

Authored by Greer Yacavone

Chemistry

10th Grade

NGSS covered

Used 2+ times

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31 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Elements in the same group have similar properties because:

they have the same number of protons.

they have the same number of neutrons.

they have the same number of valence electrons.

they have the same atomic mass.

Tags

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an alkali metal?

Helium

Sodium

Iron

Carbon

Tags

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A halogen is a type of:

Metal

Noble gas

Non-metal

Alkali metal

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A noble gas is:

a type of metal

a type of non-metal

an inert (unreactive) gas

a radioactive element

Tags

NGSS.HS-PS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a characteristic of transition metals?

They are all gases at room temperature.

Nearly all are solid at room temperature.

They are non-conductive.

They are all radioactive.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is an inner transition metal?

A type of metal found in the s-block of the periodic table

A type of metal found in the p-block of the periodic table

A type of metal found in the d-block of the periodic table

A type of metal found in the f-block of the periodic table

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The arrangement of the periodic table reflects:

the atomic number of elements

the alphabetical order of elements

the date of discovery of elements

the color of elements

Tags

NGSS.HS-PS1-1

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5.2: Classification of the Elements

Elements in the same group have similar properties because:

Which of the following is an alkali metal?

A halogen is a type of:

A noble gas is:

Which of the following is a characteristic of transition metals?

What is an inner transition metal?

The arrangement of the periodic table reflects:

An element’s electron configuration, particularly regarding its valence electrons, determines its ________.

What is the electron configuration for lithium?

What is the electron configuration for sodium?

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