Rutherford shot alpha particles and discovered that:

Atoms contained a small dense nucleus

Democritus used the word 'atomos' in 450BC to describe:

The smallest piece of matter which could not be divided

Which of the following shows atoms of the same element?

Two isotopes with the same number of protons

Lavoisier discovered the Law of Conservation of Mass which says:

Matter cannot be created or destroyed

The Russian Scientist Mendeleev was recognised for:

Creating the modern periodic table/ predicting new elements

What is the best description of an element?

A pure substance containing only one kind of atom

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History of the Periodic Table and Atoms

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Heinemann Chapter 1

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Questions 15

Answers

1
What is the atomic number of this atom?
39
20
19
18
2
How many electrons does this atom lose/gain to become an ion?
1 gained
1 lost
2 lost
7 gained
3
Which scientist discovered that electrons actually orbit in a cloud around the nucleus?
Bohr
Rutherford
Dalton
Schrodinger
4
Rutherford shot alpha particles and discovered that:
Atoms contained a small dense nucleus
Atom nuclei consisted of neutrons and protons
Atoms had orbiting electrons
Atoms looked identical to the solar system
5
What is the atomic mass of this atom?
19
1
20
39
6
Democritus used the word 'atomos' in 450BC to describe:
The smallest piece of matter which could not be divided
How all things were made of different elements
Protons in an atom
The immensity of the universe and all of the matter in it
7
How many electrons in this atom?
19
18
20
21
8
Which of the following shows atoms of the same element?
Two isotopes with the same number of protons
Two isotopes with the same number of neutrons
Two isotopes with different numbers of all particles
Two isotopes with the same number of electrons
9
Lavoisier discovered the Law of Conservation of Mass which says:
Energy cannot be created or destroyed
Matter can be created or destroyed
Energy can be created or destroyed
Matter cannot be created or destroyed
10
Who discovered the electron?
Thomson
Seaborg
Rutherford
Bohr
11
Even though the Shrodinger atom is more correct we often use Bohr's model because:
It is an equal alternative
It is prettier
It is made be a Nobel-winning scientist
It is easier to work with
12
How many electrons are gained/lost when fluorine becomes an ion?
loses 7
loses 1
gains 7
gains 1
13
The Russian Scientist Mendeleev was recognised for:
Creating the modern periodic table/ predicting new elements
Finding elemental oxygen
Creating the symbols that we use for elements
Having an amazing laboratory with lots of glassware
14
What is the best description of an element?
A pure substance with atoms fixed proportions
A pure substance containing one type of isotope
An impure substance containing elements in fixed proportions
A pure substance containing only one kind of atom
15
What is the written configuration of the following atom?
2,8,18,32
2,8,8,2
2,8,8,1
1,2,3,4

History of the Periodic Table and Atoms Flashcards | StudBud