1b Chemistry

Question 1

Define what an element is

Answer 1

A substance that cannot be broken down any further

Question 2

What is a compound?

Answer 2

Two or more different elements combined

Question 3

Name the three subatomic particles and what their charges are

Answer 3

Neutrons (neutral) , protons (positive) and electrons (negatives).

Question 4

Define a covalent bond

Answer 4

A strong bond by SHARING a pair of valence electrons

Question 5

What is an ionic bond?

Answer 5

The TRANSFER of valence electrons between atoms. Between two opposite charged ions.

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Question 6

What is a hydrogen bond?

Answer 6

A weak covalent bond between two atoms from a proton (positive charge) and an electro negative atom in another.

Question 7

What is a polar covalent bond?

Answer 7

A covalent bond between atoms that differ in electronegativity. The shared electrons are pulled closer to the more electronegative atom, making it slightly negative and the other atom slightly positive.

Question 8

What is a non polar covalent bond?

Answer 8

A type of covalent bond in which electrons are shared equally between two atoms of similar electronegativity.