COVALENT BONDS Flashcards Preview

SCIENCE > COVALENT BONDS > Flashcards

Flashcards in COVALENT BONDS Deck (12):
1

covalent bond

the chemical bond formed when two atoms share electrons. They usually form between atoms of NONMETALS.

2

What is the force that holds atoms together in a covalent bond?

the force that holds atoms together in a covalent bond is a chemical bond that forms when two atoms share electrons.

3

molecule

a group of atoms with no electric charge joined by covalent bonds.

4

When atoms share electrons with another atom do they lose or gain electrons? if not, why?

They do not lose or gain electrons because they share and both have a stable set of 8 electrons.

5

Double bonds

two atoms share 2 pairs of electrons.

6

triple bonds

when two atoms share 3 pairs of electrons.

7

The number of covalent bonds an atom can form depends on what?

on the number of valence electrons

8

molecular compound

is a compound that is made up of molecules.

9

properties of molecular compounds

1.less heat is needed to melt a solid molecular compound compared to ionic compounds.
2.they are liquids or gasses at room temperature.
2. they do not conduct electricity

10

polar bond

a covalent bond in which electrons are not equally shared.

11

Unequal sharing of electrons

like tug of war, some atoms pull strongly on the shared electrons so they are pulled more toward one atom and causes the bonded atom to have slight electrical charge.

12

nonpolar bond

a covalent bond in which the electrons are shared equally. ex. pg 34 in book