chapter 6 and 7

Question 1

what is the significance of the staircase on the periodic table?

Answer 1

separate the metals and non metals

Question 2

who designed the earliest periodic table?

Answer 2

dmitri mendeleeve

Question 3

what is an element

Answer 3

pure substance that can’t be broken down into a simpler chemical substance

Question 4

what is a compound

Answer 4

two or more elements chemically joined

Question 5

what is a period

Answer 5

a horizontal row showing increasing and decreasing reactive rows

Question 6

what is a group

Answer 6

elements in the same family

Question 7

what is a metal

Answer 7

can visually see it, can have colours, odour, or taste

Question 8

what is a non metal

Answer 8

tasteless, colourless, odourless

Question 9

what is an atomic number

Answer 9

number of protons in a nucleus

Question 10

what is mass

Answer 10

weighted average of the isotopes of that element

Question 11

what is a proton

Answer 11

positively charged particle in the nucleus

Question 12

what is a neutron

Answer 12

particle in the nucleus with no charge

Question 13

what is an electron

Answer 13

a negatively charged particle in the nucleus

Question 14

similarities and differences between the bohr diagram and plum pudding model

Answer 14

similarities - both have electrons and protons around the nucleus
differences - plum pudding has small negative particles emitted by hot materials and bohr has a rainbow passing thru a prism

Question 15

what are the maximum number of electrons that can be found in the first three orbits

Answer 15

2, 8, 8

Question 16

what is similar between the atomic theory and students working together

Answer 16

newer developers have added and made corrections to the atomic theory, students do that with their school work

Question 17

what does the term diatomic mean

Answer 17

when there are two of the same element

Question 18

what are the 7 diatomic elements

Answer 18

H2, N2, O2, F2, Cl2, Br2, I2

Question 19

what does ionic bond mean

Answer 19

when a non metal and metal combine

Question 20

what does a molecular element mean

Answer 20

when two of the same non metals combine

Question 21

what does an alloy mean

Answer 21

when a metal and metal combine

Question 22

what is the difference between a molecular element and molecular compound

Answer 22

a molecular compound is are molecules containing more than one element and a molecular element is two of the same elements

Question 23

how do ionic compounds form

Answer 23

when a positive and negative charged particle combine (cation and anion)

Question 24

which elements combine to form molecules

Answer 24

non metals

Question 25

what elements form ionic compounds

Answer 25

metals and non metals

Question 26

compound of one iron atom (Fe) and oxygen (O) and the other compound with two iron atoms three oxygen atoms

Answer 26

FeO and Fe2O3