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Alchemy Quiz 12

Authored by Linda Anderson

Science

8th Grade

NGSS covered

Used 425+ times

Alchemy Quiz 12
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What element has two electron shells and 3 valence electrons?

Li

Be

B

Mg

Answer explanation

The row number will tell you the number of electron shells. The Group A number will tell you the number of valence or outer shell electrons.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If an element is located in Group 4A of the periodic table, what can you conclude about atoms of this element?

It has properties similar to beryllium.

It has four valence electrons.

It has four core electrons.

It has four electron shells.

Answer explanation

The Group A number will tell you the number of valence electrons. Elements in the same group (column) will have similar properties.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

To create an ion from a neutral atom, which of these values is changed?

number of nuclei

number of protons

number of neutrons

number of electrons

Answer explanation

Atoms can be become ions (charged atoms) by either gaining or losing outer shell electrons.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When a magnesium atom forms an ion with a noble gas configuration, what will its charge be?

3+

2+

1+

1-

2-

Answer explanation

Magnesium (#12 in Group 2A) has two outer shell electrons. It "wants" to be like a noble gas, with eight outer shell electrons. It's much easier for magnesium to give up two electrons than to find six more. Transferring two electrons will give magnesium the electron configuration of neon (#10) but with two more protons than neon.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which of these are the correct labels for the two shell diagrams shown?

a fluorine atom and a fluoride ion with a charge of 1-

a fluorine atom and a fluoride ion with a charge of 1+

a fluorine atom and a neon atom

a neon ion with a charge of 1+ and a neon atom

Answer explanation

The only difference is the number of electrons. If an atom has more electrons than protons, it has a net negative charge.

Tags

NGSS.MS-PS1-1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An ion is created when what part of the atom is gained or lost?

protons

neutrons

electrons

alpha particles

Answer explanation

An ion is an atom that has different numbers of protons and electrons. Only outer shell electrons can be transferred from metals to nonmetals.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many valence electrons do most Noble Gases have?

2

4

8

18

Answer explanation

Noble gases are in Group 8A, The group A number tells you the number of valence or outer shell electrons (with the exception of helium).

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