Chapter 4: Atoms and Elements

Question 1

Who designed the periodic table?

Accepted Answer

Mendeleev

Question 2

Which of these is NOT a diatomic element?

Accepted Answer

C

Question 3

What symbol is the number of protons given?

Accepted Answer

Z

Question 4

What charge do the atoms in 2A form?

Accepted Answer

+2

Question 5

What&#x27;s wrong with Dalton&#x27;s theory that "All atoms of a given element have the same mass and other properties"?

Accepted Answer

Isotopes have different masses

Question 6

What family is 2A?

Accepted Answer

Alkaline earth metals

Question 7

What&#x27;s the charge of the nucleus?

Accepted Answer

Positive

Question 8

What are positively charged ions called?

Accepted Answer

Cations

Question 9

What is wrong with Dalton's theory that "Elements are made of tiny, indestructible, indivisible particles called atoms"?

Accepted Answer

Atoms can be divided by nuclear means

Question 10

What is the conductivity of metalloids?

Accepted Answer

They have intermediate conductivity which can be changed and controlled

Question 11

What is the number of electrons of 163C-1

Accepted Answer

7

Question 12

What is the symbol for mass number?

Accepted Answer

A

Question 13

Which of these particles are negatively charged?

Accepted Answer

Electrons

Question 14

Which device showed that electrons have a negative charge?

Accepted Answer

Cathode ray tube

Question 15

What do theoretical physicists think atoms are made of?

Accepted Answer

Quarks

Question 16

What charge does aluminum form?

Accepted Answer

+3

Question 17

What are atoms with the same number of protons but different numbers of neutrons called?

Accepted Answer

Isotopes

Question 18

Which 2 elements are liquid at room temperature?

Accepted Answer

Bromine and mercury

Question 19

True or False: Isotopes are CHEMICALLY alike

Accepted Answer

True

Question 20

Which of these tend to gain electrons when they undergo a chemical change?

Accepted Answer

Non metals

Question 21

Which of these was NOT a part of Dalton&#x27;s atomic theory?

Accepted Answer

Atoms are composed of protons, neutrons, and electrons, which balance out

Question 22

What is the mass of an electron relative to that of a proton?

Accepted Answer

1/1840

Question 23

Who proposed that atoms must contain a positive charge to balance out the negative charge?

Accepted Answer

Thompson

Question 24

Which of these do not form +2 charge?

Accepted Answer

Silver, Aluminum

Question 25

What is the charge of elements on the periodic table?

Accepted Answer

Neutral

Question 26

Who&#x27;s theory defied Democritus&#x27;s?

Accepted Answer

Aristotle

Question 27

Which of these is not magnetic?

Accepted Answer

Copper

Question 28

What is the law of definite proportions?

Accepted Answer

A chemical compound contains all the exact elementss in exact proportions

Question 29

What is an element?

Accepted Answer

A substance that cannot be chemically broken down into simpler substances

Question 30

What model is this and who proposed it?

Accepted Answer

Plum pudding, Thompson

Question 31

What occupies the left side of the periodic table?

Accepted Answer

Metals

Question 32

Which of these are good malleability, ductility, and conductivity?

Accepted Answer

Metals

Question 33

What is the mass number of 163C-1

Accepted Answer

13

Question 34

What are negatively charged ions called?

Accepted Answer

Anions

Question 35

What is the smallest identifiable unit of an element?

Accepted Answer

Atom

Question 36

If the mass of a proton is 1, what is the relative mass of a neutron?

Accepted Answer

1

Question 37

Who was the first person on record to come up with the idea of atoms?

Accepted Answer

Democritus

Question 38

What is the mass number?

Accepted Answer

The total number of protons and neutrons in an atom

Question 39

Where is most of the atom&#x27;s mass located?

Accepted Answer

Nucleus

Question 40

Who found the rays traveling in the opposite direction of the electrons in the cathode ray tube?

Accepted Answer

Goldstein

Question 41

What was the main thing wrong with Democritus&#x27;s and Aristotle&#x27;s theories?

Accepted Answer

The both lacked in evidence to back them up

Question 42

What determines the identity of an element?

Accepted Answer

# of protons

Question 43

Which of these is NOT a diatomic element?

Accepted Answer

K

Question 44

True or False: All atoms of a given element have the same number of neutrons

Accepted Answer

False

Question 45

What family is 7A?

Accepted Answer

Halogens

Question 46

Democritus reasoned that atoms are:

Accepted Answer

Indivisible and indestructible

Question 47

How many naturally occuring elements are there?

Accepted Answer

91

Question 48

True or False: All atoms of a given element have the same number of protons

Accepted Answer

True

Question 49

What charge do the atoms in 6A form?

Accepted Answer

-2

Question 50

Who discovered the electron?

Accepted Answer

Thompson

Question 51

What is on the top row of the bottom section?

Accepted Answer

Lanthanides

Question 52

Who performed the "gold foil" experiment?

Accepted Answer

Rutherford

Question 53

True or False: All elements have their own unique percent natural abundance of isotopes

Accepted Answer

True

Question 54

Who discovered the neutron?

Accepted Answer

Chadwick

Question 55

What lies along the zigzag line on the periodic table?

Accepted Answer

Metalloids

Question 56

How do you calculate the number of neutrons in an isotope?

Accepted Answer

Mass number - Atomic Number

Chapter 4: Atoms and Elements

Questions 56

Chapter 4: Atoms and Elements

Questions 56