gen-chem 1st quart

Question 1

The emergence of chemistry as a discipline of science began with..

Answer 1

Anglo-Irish philosopher ROBERT BOYLE

Question 2

Robert Boyle published this a discipline of science in 1661

Answer 2

The Sceptical Chymist

Question 3

Robert Boyle defined it as the simplest composition of matter that cannot be broken down further by any chemical means

Answer 3

element

Question 4

Robert Boyle suggested that atoms of elements combine to form different..

Answer 4

compounds

Question 5

The interest on the concept of elements and compounds heightened when _______ isolated oxygen gas

Answer 5

Joseph Priestley

Question 6

Priestly called oxygen gas as

Answer 6

dephlogisticated air

Question 7

He formulated the “law of conservation of mass”

Answer 7

Antoine-Laurent Lavoisier

Question 8

States that a chemical reaction, the mass of the substances produced is equal to the mass of the substances reacted

Answer 8

Law of conservation of mass

Question 9

It is the foundation for stoichiometric calculations

Answer 9

Law of conservation of mass

Question 10

Known as the father of modern chemistry

Answer 10

Antoine Lavoisier

Question 11

He established the law of definite proportions

Answer 11

Joseph-Louise Proust

Question 12

The law of definite proportions is also called as

Answer 12

the law of definite composition

Question 13

States that any sample of a given compound will always be composed of the same elements in the same proportion by mass

Answer 13

The law of definite proportions

Question 14

He proposed the law of multiple proportions

Answer 14

John Dalton

Question 15

This fundamental law states that for elements that can form different compounds, the masses of the second element that can combine with a fixed mass of the first element are in a ratio of small whole numbers.

Answer 15

The law of multiple proportions

Question 16

John Dalton proposed an atomic theory of matter that can explain chemical observations as predicted by the three fundamental laws

Answer 16

A New System of Chemical Philosophy

Question 17

He discovered the “electron” while studying the nature of cathode rays

Answer 17

Joseph John Thomson

Question 18

Cathode rays in an evacuated tube

Answer 18

cathode ray tube (CRT)

Question 19

are deflected by a negatively charged plate and attracted by a positively charged plate as if the rays consisted of negatively charged particles

Answer 19

cathode ray tube (CRT)

Question 20

A German physicist who discovered X-ray

Answer 20

Wilhelm Conrad Roentgen

Question 21

A French physicist who discovered radioactivity of uranium

Answer 21

Henri Becquerel

Question 22

A British physicist who discovered and described the alpha and beta rays as positively and negatively charged radiations

Answer 22

Ernest Rutherford

Question 23

Rutherford discovered the proton in

Answer 23

1920

Question 24

Who discovered protons

Answer 24

Rutherford

Question 25

Rutherford’s co-researcher who discovered the other type of particle in the nucleus: [who & what]

Answer 25

James Chadwick; Neutrons

Question 26

The nucleus at the center consists of protons and neutrons, collectively known as..

Answer 26

Nucleons

Question 27

Represents the number of protons in its nucleus

Answer 27

Atomic number

Question 28

Indicates the total number of protons and neutrons; it is an estimate of the element’s atomic mass

Answer 28

Mass number

Question 29

They have different mass numbers but the same atomic number; Follow the same configuration for elements

Answer 29

Isotopes

Question 30

Principal fuels for nuclear reactors

Answer 30

Uranium isotopes

Question 31

Naturally occurring uranium percentages are reffered to as

Answer 31

Isotopic abundances

Question 32

when a neutral atom gains or loses one or more electrons, it becomes an electronically charged particle called..

Answer 32

ion

Question 32

Metals tend to lose electrons and become positively charged..

Answer 32

cations

Question 33

Nonmetals gain electrons and become negatively charged

Answer 33

anions

Question 34

The number of electrons lost or gained is the..

Answer 34

charge number

Question 35

an ion that consists of only one atom is referred to as a..

Answer 35

monatomic ion

Question 36

different atoms can also combine and form

Answer 36

polyatomic acid

Question 37

when atoms of nonmetals share electrons, they form an electrically neutral aggregate called..

Answer 37

molecule

Question 38

What are the diatomic molecules

Answer 38

I, Br, Cl, F, O, N, H

Question 38

nonmetallic elements exist in nature as..

Answer 38

diatomic molecules

Question 39

Results from an attraction between a cation and an anion

Answer 39

Ionic compound

Question 40

Setting the charge number of one ion as the subscript of the other ion

Answer 40

Crisscross rule

Question 41

some ionic compounds have water molecules incorporated in their structure and are called

Answer 41

hydrated salts

Question 42

Ionic compounds without their water molecules

Answer 42

anhydrous

Question 43

Are compounds that can give off hydrogen ions when dissolved in water (aqeuous)

Answer 43

acids

Question 44

results when nonmetals share electrons

Answer 44

covalent compound

Question 45

naming most compounds of carbon

Answer 45

organic compounds

Question 46

contains the symbol and the corresponding answer of atoms of all the elements in a compound

Answer 46

molecular formula

Question 47

shows only the reduced form of a molecular formula

Answer 47

empirical formula

Question 48

shows the bond pattern and connectivity of atoms in a compound

Answer 48

structural formula

Question 49

simplifies the structural formula, in which bonding patterns and connectivity are less obvious but are still prettier

Answer 49

condensed structural formula