1st monthly

Question 1

Way to identify the different isotopes of an element is through a symbol called _______________________

Answer 1

isotope notation.

Question 2

First proposed the idea of an ATOM.

He believed that all things are made up of tiny, indivisible particles.

Answer 2

Leucippus (480 BCE-460 BCE)

Question 3

Formation of light elements

Answer 3

Big bang nucleosynthesis

Question 4

If the charge on the atom is zero, then zero is ________________

Answer 4

not written.

Question 5

4 parts of isotope notation.

Answer 5

Element symbol
A – mass number (protons + neutrons)
Z – atomic number (number of protons)
e – atomic charge (protons - electrons

Question 6

The process by which elements are created within stars by combining together the protons and neutrons from the nuclei of lighter elements.

Answer 6

Stellar nucleosynthesis

Question 7

_______ is a pure substance that is made up of only one kind of atom.

Answer 7

Element

Question 8

If the number of ________ is not stated, then it is presumed to be equal to the number of protons.

Answer 8

electrons

Question 9

– is the process by which light nuclei fuse together to form a heavier nucleus

Answer 9

Nuclear fusion

Question 10

_______ is the basic unit of matter.

Answer 10

Atom

Question 11

The theory of the atom started on the ______________________________

Answer 11

5th century BCE in Ancient Greece.

Question 12

is the process that creates new atomic nucleus from pre existing nucleons, primarily protons and neutrons

Answer 12

Nucleosynthesis –

Question 13

tremendous amount of energy is release

Answer 13

Nuclear fusion

Question 14

He formulated his theory based on Antoine Lavoisier’s (1743-1794) law of conservation of mass and Joseph Proust’s (1754-1826) law of definite proportion.

Answer 14

John Dalton (1766-1844)

Question 15

Atoms of the same element that have the same atomic number (Z) but different mass number (A).

Answer 15

Isotopes

Question 16

Law of Conservation of Mass

Answer 16

The total mass of substances before and after a complete reaction are equal.

Question 17

A student of Leucippus, also thought the same way.

He posited that all matter was composed of small indestructible particles, which he called atoms, from the Greek word atomos, which means “indivisible”.

Answer 17

Democritus (460 BCE -370 BCE)

Question 18

This idea meant that if you were to cut a piece of object (matter), there would be a point wherein the object could no longer be further split into pieces.

Thus, matter can be subdivided only to a certain point, at which only atoms remain.

(the person and the belief)

Answer 18

Democritus- The idea of ATOM

Question 19

Density inside a star is great enough to sustain fusion for the extended time periods required to synthesize heavy elements.

Answer 19

Stellar nucleosynthesis

Question 20

Nuclear synthetic pathways that can produce heavier elements

Answer 20

Carbon-nitrogen-oxygen cycle
Proton-proton fusion
Triple alpha process

Question 21

Elements heavier than iron cannot be formed through fusion as ____________________________________________ are needed for the reaction to occur

Answer 21

tremendous amounts of energy

Question 22

He strongly opposed Leucippus and Democritus’s theory that atoms were indivisible.

Answer 22

aristotle (384 BCE-322 BCE)

Question 23

He revived the idea of atomic theory 2000 years after Democritus first proposed about it.

Answer 23

John Dalton (1766-1844)

Question 24

Formation of heavier elements

Answer 24

Stellar nucleosynthesis

Question 25

The CRT was further improved by _______________________ using his Braun tube, which was the prototype of early television tubes and computer monitors.

Answer 25

Karl Ferdinand Braun (1850-1918)

Question 26

He believed that all things can be divided indefinitely; therefore, he said there was no smallest part of matter.

Answer 26

aristotle (384 BCE-322 BCE)

Question 27

Those who supported Leucippus and Democritus’s idea of the atom were called ______

Answer 27

ATOMISTS.

Question 28

In the early 17th century, he said that each Democritean atom is a perfect Aristotelian mix in that the elements are like shells that hide the secret “first principles” or seeds. (i.e., atoms)

Answer 28

Andreas Libavius (1555-1616)

Question 29

____________ produced during the BBN

Answer 29

Isotopes

Question 30

they tried to explain atomic theory based on experiments unlike the philosopher’s logical way of explaining.

Answer 30

Alchemists

Question 31

In 1619, he experimented on how precious metals could be dissolved in acid and then precipitated using alkali. This experiment paved the way for the mechanical philosophy of Robert Boyle (1627-1691) and Rene Descartes (1596-1650).

Answer 31

Daniel Sennert (1572-1637)

Question 32

He also claimed that all matter is consisted of four elements- earth, fire, water and air.

Answer 32

aristotle

Question 33

the major postulates of Dalton’s atomic theory:

Answer 33

1Matter is composed of small indivisible particles called atom. 2Atoms of the same element are identical. 3Compounds contains atoms of more than one element. 4In a compound, atoms of different elements always combine in the same way.

Question 34

Elements form during nuclear fusion

Answer 34

Hydrogen (H) Helium (He) Lithium (Li) Beryllium (Be)

Question 35

Law of Definite Proportions

Answer 35

Elements combine in a fixed proportion to form a compound.

Question 36

In Neutron capture reaction, Heavy elements are formed in a ________

Answer 36

supernova

Question 37

The _________________________ is a glass tube with two electrodes: the positive electrode called ANODE and the negative electrode called _________

Answer 37

Cathode Ray Tube | cathode

Question 38

______ is a medieval practice which aims to transform a metal into gold.

Answer 38

Alchemy

Question 39

A form an element that has the same atomic number of the original element but with a different atomic mass or mass number

Answer 39

Isotopes

Question 40

Because he was more popular and influential during that time, many people accepted his idea.

Answer 40

aristotle

Question 41

He first identified the cathode rays which were confirmed by ______________ using his Crookes tube. (2 person)

Answer 41

Julius Plucker (1801-1868) Sir William Crookes (1832-1919)