For this magnesium atom, what is the atomic number and the mass number?

Its atomic number is 12 and its mass number is 24

Elements are groupings of identical atoms. How many elements are there and where can you see all the elements?

in the periodic table of the elements and there's 118

What is the Mass number

The sum of the number of protons and neutrons in an atom

According to Bohr....

Electrons spin around the nucleus in fixed orbits

A chemical reaction is caused by...

Two types of atoms recombining into different atoms

A material that is made of only one type of atom

In Rutherfords experiment, the majority of particles lauched at the gold leaf pass through it, why?

Becuase the atom is mostly empty space

According to the atomic model of Thomson, what do atoms look like

Small spheres with positive charges with electrons in the center

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Chemistry quiz over atoms

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Física y Química Tema 2 El átomo IES Los Cahorros 3ºESO

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Questions 20

Answers

1
For this magnesium atom, what is the atomic number and the mass number?
Its atomic number is 24, and its mass number si 12
Its atomic number is 12 and its mass number is 24
its atomic number and mass number are 12
2
Who discovered the neutron
Lavoisier
Thomson
Rutherford
James Chadwick
3
What is the charge of an atom
high
Positive
Neutral
Negative
4
Elements are groupings of identical atoms. How many elements are there and where can you see all the elements?
In the Periodic table and there's 122
In the periodic table and there's 116
In the surf table and there's 118
in the periodic table of the elements and there's 118
5
What is the Mass number
The sum of the number of neutrons and electrons
The sum of the number of protons and neutrons in an atom
The sum of the number of electrons
The sum of the number of Protons
6
According to Thomsons Atomic model, what can we compare with an atom?
A watermelon
An orange
Its impossible to compare it with anything
The solar system
7
What letter represents the Atomic number?
Z
A
X
8
What is the atomic number?
The number of neutrons
The sum of the number of protons, electrons, and neutrons
The number of protons
The number of electrons?
9
According to Bohr....
Electrons spin around the nucleus in fixed orbits
The electrons can orbit the nucleus from random distances
10
J. J. Thomson won a nobel prize for his work in....
chemistry
peace
physics
medicine
11
Where is the mass number located?
Top left
bottom right
Right
Top
12
Who discovered the electron
Rutherford
Antoine Lavoisier
John Dalton
J.J. Thomson
13
A chemical reaction is caused by...
Atoms becoming different atoms
Two types of atoms recombining into different atoms
black magic
A Party that atoms have to combine with eachother
14
An element is
a material made up of different types of atoms
Fire, earth, water, air
A type of energy from the union of atoms
A material that is made of only one type of atom
15
John Dalton hypothesized that atoms are hollow (nothing inside)
False
True
16
In Rutherfords experiment, the majority of particles lauched at the gold leaf pass through it, why?
Because the particles missed the target
Because the particles were too fast
Because the particles are too small
Becuase the atom is mostly empty space
17
What did Joseph John Thomson discover?
none of the above
The proton
The Neutron
the higgs boson
18
Who was a student of Rutherford?
Louis Pasteur
Santiago Ramón y Cajal
James Chadwick
Alexander Fleming
19
In his experiment Rutherford used a leaf of...
Ag Silver
Au Gold
20
According to the atomic model of Thomson, what do atoms look like
Big spheres with negative charges and electrons in the center
Small spheres with positive charges with electrons in the center
small cubes with a netural charge and neutrons in the center
small spheres with positive charges and protons in the center

Chemistry quiz over atoms Flashcards | StudBud