Flashcard on Atomic Structure

Front

How many valence electrons are in the carbon atom?

Back

4

Answer explanation

Carbon has 4 valence electrons, which are the electrons in its outer shell that can participate in bonding. This is why the correct answer is 4.

Front

How many rings (electron orbitals around the nucleus) does the Carbon atom have?

Back

2 rings or electron orbitals

Answer explanation

The Carbon atom has 6 electrons. These electrons are arranged in 2 electron orbitals: the first orbital can hold 2 electrons, and the second can hold up to 4. Therefore, there are 2 rings or electron orbitals around the nucleus.

Front

Which row would have three rings (electron orbitals)?

Back

C

Answer explanation

Row C has three rings, indicating it contains three electron orbitals. Each ring corresponds to a different energy level, which is why C is the correct choice.

Front

Valence electron

Back

An electron that participates in chemical bonding and is found in the outermost energy level of an atom.

Answer explanation

A valence electron is found in the outermost energy level of an atom and is crucial for chemical bonding. This distinguishes it from electrons in inner levels or those that do not participate in bonding.

Front

How many valence electrons are there in the Bohr model of oxygen?

Back

6

Answer explanation

Oxygen has an atomic number of 8, meaning it has 8 electrons. In the Bohr model, the first shell holds 2 electrons, and the second shell can hold up to 8. Therefore, oxygen has 6 valence electrons in its outer shell.

Front

How many valence electrons do the elements in the highlighted group have?

Back

5

Answer explanation

The elements in the highlighted group are from Group 15 of the periodic table, which have 5 valence electrons. This is why the correct answer is 5.

Front

How many valence electrons do the elements in the highlighted group have?

Back

7

Answer explanation

The elements in the highlighted group are the halogens, which are in Group 17 of the periodic table. They have 7 valence electrons, which is why the correct answer is 7.

Front

How many valence electrons do the elements in the highlighted group have?

Back

1

Answer explanation

The elements in the highlighted group are alkali metals, which have 1 valence electron. This is characteristic of Group 1 in the periodic table, making the correct answer 1.

Front

Select the correct Lewis structure for chlorine. Options: Option 1, Option 2, Option 3, Option 4

Back

Option 2

Answer explanation

Option 2 correctly represents chlorine with 7 valence electrons, showing 3 lone pairs and 1 bond. This structure accurately depicts chlorine's ability to form one bond while maintaining its octet.

Front

Select the correct Lewis structure for silicon.

Back

Option 3

Answer explanation

Silicon has four valence electrons, which are represented as four dots around the symbol Si in Option 3. This correctly depicts its Lewis structure, showing the potential for bonding with other elements.