Science

Question 1

what is the dot value on an lewis dot diagram

Answer 1

of valence electrons

Question 2

what does the total charge in the ionic compound equal to?

Answer 2

0

Question 3

How to name ionic compounds that countain multivalent metals?

Answer 3

-They usally have more than one charged stated so use the roman numeral to indcate which charge

Question 4

ionic charge:

+1
+2
+3
+4
In roman numeral

Answer 4

I
II
III
IV

Question 5

what does the roman numeral indicate

Answer 5

the charges of the multivalent metal

Question 6

How to create chemicals formulas (ionic compound):

Answer 6

1. Write the symbol of the element involved
   2.Use the charges (valence) of each ions determine + how many to balance out

Question 7

How to create chemicals formulas (covalent compound) / two metals

Answer 7

-Write the symbol of the element
-use the prefixe to indacte the# of atoms

Question 8

what are the 8 prefixes

Answer 8

Mono- = 1 (Note: “Mono-“ is usually omitted for the first element)
Di- = 2
Tri- = 3
Tetra- = 4
Penta- = 5
Hexa- = 6
Hepta- = 7
Octa- = 8

Question 9

if formula has __________ then you add + gas

Answer 9

I
H
N
Br
O
CI
F

Question 10

whats the law of conservation of mass?

Answer 10

matter cannot be created or destroyed in an chemical reaction

total mass of reactans = total mass of products

Question 11

3 properties of an acid + 3 times used in life

Answer 11

properties:
-turns pink litmus paper blue
-pH more than 7
-reacts w/ base

Used irl:
-lemon juice
-vinegar
-skincare

Question 12

3 properties of an base + 3 times used in life

Answer 12

properties:
-turns blue litmus paper pink
-pH less than 7
-reacts w/ acid

Used irl:
-baking soda
-lime
-ammonia

Question 13

which combustion is more dangerous?

Answer 13

incomplete combustion because it produces toxic gases like carbon monoxide.