Chemistry Test 2

Question 1

Mole

Answer 1

Avogadro’s Number (N^a)
The number of atoms/molecules/particles etc in one mole

Question 2

Mole Number

Answer 2

6.022*10^23

Question 3

Mole Example

Answer 3

1 mole of carbon has a mass of 12.01 grams
1 mole of Mg has the mass of 24.31 grams

Question 4

molar mass

Answer 4

atomic mass of an element express in g/mol

Question 5

atoms

Answer 5

the smallest unit of an element that retains the chemical properites of that element

Question 6

compound

Answer 6

a substance made of atoms of 2 or more different elements joined by chemical bonds, either moleculor or ionic

Question 7

Diamtomic Element

Answer 7

Hydrogen (H)
Nitrogen (N)
Oxygen (O)
Fluorine (F)
Chlorine (Cl)
Bromine (Br)
Iodine (I)

Question 8

polyatomic ion

Answer 8

an ion composed of more than one atom

Question 9

Parts of Atoms

Answer 9

Orbital & Nucleus

Question 10

Orbital

Answer 10

a region where is a high probability of finding an electron

Question 11

Nucleus

Answer 11

very demse and compact most of the mass located here, 1/10,000th of the volume

Question 12

Inside the atoms

Answer 12

Proton (p+) neutron (n^0) electron (e-)

Question 13

proton

Answer 13

mass in kg: 1.67*10^-27 charge: +1

Question 14

neutron

Answer 14

mass in kg: 1.675*10^-27 charge: 0

Question 15

electron

Answer 15

mass in kg: 9.11*10^-3 charge: 0

Question 16

What define a element?

Answer 16

number of protons

Question 17

Mass number

Answer 17

(p+ and n^0)

Question 18

atomic number

Answer 18

(proton)

Question 19

Isotopes

Answer 19

atoms of the same elemnt with different number of neutrons and therefore different mass the atomic mass takes into account the relative abundance of all the isotopes

Question 20

Ionics

Answer 20

Atoms or molecules with a change due to gaining or losing e-

Question 21

Ions

Answer 21

cationd, anions

Question 22

cations

Answer 22

positive; lose electron

Question 23

anions

Answer 23

negative; gains electron