chem quiz

Question 1

covalent compounds

Answer 1

non metal + nonmetal
share a pair of electrons

Question 2

all compounds start with a and end with a

Answer 2

positive charge
negative charge

Question 3

balancing steps

Answer 3

1) metals
2) polyatomics
3) nonmetals
4) hydrogen and oxygen last

Question 4

synthesis

Answer 4

forming one product from different reactants
ex. 2H2 + O2 —> 2H2O

Question 5

decomposition

Answer 5

the reverse of synthesis
one compound breaks down to form two or more new substances
ex. H2O —> 2H2 + O2

Question 6

double replacement

Answer 6

the ions in two compounds switch places to from two new compounds
positives switch spots
Na+Cl + Ag+No3 —> AgCl + NaNO3

Question 7

single replacement

Answer 7

one element replaces a similar element in a compound
in the reaction the two metals switch as products
element + compound —> elemental substance + compound

Question 8

in neutralization , water has to be written as

Answer 8

HOH

Question 9

brinclhoffs

Answer 9

Br2
I2
N2
Cl2
H2
O2
F2

Question 10

when organic substances combust, they form

Answer 10

carbon dioxide and water
CO2 H2O

Question 11

You know that you have an organic compound when it has

Answer 11

carbon and hydrogen