Chemical Bonding Flashcards Preview

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Flashcards in Chemical Bonding Deck (17)
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0
Q

Name the two types of bonding

A

Ionic and Covalent

1
Q

What do elements do with each other and why?

A

Elements react with each other to achieve a full outer shell of electrons.

2
Q

How is an ionic bond formed?

A

the losing and gaining of electrons

3
Q

What are ions?

A

Ions are charged atoms

4
Q

When do atoms become ions?

A

When they lose or gain electrons they become ions

5
Q

What charges attract?

A

Opposite charges attract.

6
Q

If sodium has one electron on it’s outer shell what does it need to do?
Why?

A

It needs to loose one electron to have a full outer shell

7
Q

If chlorine has 7 electrons on it’s outer shell, what does it need to do and why?

A

Chlorine needs to gain an electron for a full outer shell

8
Q

If sodium needs to lose an electron and chlorine needs to gain one what does sodium do?

A

Sodium gives an electron to chlorine.

9
Q

If sodium gives an electron to chlorine what charge does sodium have and what charge does chlorine have? Then what happens?

A

Sodium now has a positive charge, chlorine has a negative charge and so they are attracted to each other and bond.

10
Q

How is a covalent bond formed? give an example

A

A covalent bond is formed by the sharing of electrons. eg H2

11
Q

If two hydrogen atoms (one electron on outer shell)

meet what do they do and why?

A

Both Hydrogen atoms want to gain one electron to achieve a full outer shell so they share their electrons.

12
Q

Name two things formed by a covalent bond.

A

Methane CH4 and Water H2O

13
Q

How are compounds formed?

A

By the bonding of two or more different elements

14
Q

Compounds formed by ionic and covalent bonding have different ________.

A

properties

15
Q

Name 4 properties of ionic compounds.

A

solids
High melting points
soluble in water
Conduct electricity when molten or dissolved in water

16
Q

Name 4 properties of a covalent bond

A

Liquids or gases
low melting points
insoluble in water
do not conduct electricity