CHEM CH 3

Question 0

Atom

Answer 0

simplest particle of an atom

Question 1

Element

Answer 1

primary substance from which all other things are built

Question 2

What 3 basic pieces of information are on the periodic table?

Answer 2

Symbol

atomic number

		atomic mass

Question 3

metalloids

Answer 3

some characteristics of metals and some of non-metals

Question 4

Metals

Answer 4

Mostly shiny, and good conductors of heat and electricity

Question 5

Noble gases

Answer 5

Group 8A, highly unreactive

Question 6

Halogens

Answer 6

Group 7A, highly reactive

Question 7

Dalton’s Atomic Theory

Answer 7

Each element made of tiny particle called atoms

Atoms of a given element are identical

3. ..
4. ..

Question 8

What are the 3 fundamental parts of an atom?

Answer 8

Protons

Neutrons

Electrons

Question 9

Electrons

Answer 9

found outside nucleus; negatively charged, dual natured, almost massless

Question 10

protons

Answer 10

.

Question 11

neutron

Answer 11

.

Question 12

atomic number

Answer 12

number of protons in the nucleus of atom

Question 13

Mass number

Answer 13

protons + neutrons in nucleus

Question 14

Isotopes

Answer 14

atoms of the same element with different number of neutrons

Question 15

how many neutrons does hydrogen have?

Answer 15

zero

Question 16

for ground state atoms the number of protons equals?…

Answer 16

number of electrons

Question 17

What isotope is used a weighing reference for all other atoms?

Answer 17

Carbon 12

Question 18

How are electrons arranged?

Answer 18

in specific energy levels

n=1, n=2, n=3