The atom is held together by

Both attraction and repulsion forces

Where would you expect to find a nonmetal

On the right side of the periodic table

Why don't some element symbols match their name?

The symbols can be based off of the latin name

Atoms of the same element with different mass numbers

The average atomic mass is

The weighted average of the masses of all the known isotopes

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Unit 3: The Atom (PS)

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The atom and the periodic table

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Questions 21

Answers

1
Where would you expect to find protons and neutrons within an atom?
The nucleus
The energy level closest to the nucleus
The electron cloud
The outer energy level
2
The atom is held together by
Air foces
Repulsive forces
Both attraction and repulsion forces
Attractive forces
3
How many electons can fit on rings 1-4?
2, 8, 18. 7,
2, 8, 8, 18
1, 2, 3, 4
2, 8, 8, 14
4
Who was the first person to name the atom?
James Atom II
Thomson
Bohr
Democritus
5
How do we know how many valence electrons an atom will have?
Mass number
Row number
Group number
Atomic Number
6
The atomic number is the
Only the number of electrons
Number of protons
The number of protons + the number of neutrons
Number of neutrons
7
Which part of the atom is responsible for making up most of the mass?
The bohr model
The core electrons
The nucleus
The electron cloud
8
Where would you expect to find a nonmetal
In between the metals and nonmetals
On the stair case
On the right side of the periodic table
On the left side of the periodic table
9
Which subatomic particle is neutral?
Nucleus
Proton
Electon
Neutron
10
Elements in group 17 are called
Nobel gasses
Alkali metals
Halogens
Rare earth metals
11
What is the smallest form of matter that still has the same properties of the element?
The atom
The proton
The electron
The neutron
12
Which of the following is correct for a hydrogen atom with 2 neutrons?
3H
Hydrogen - 1
Hydrogen - 3
Hydrogen - 2
13
Why don't some element symbols match their name?
The symbols are randomly assigned
The symbol was set by a famous king
None of these
The symbols can be based off of the latin name
14
All matter must have
None of these
Mass
Mass and volume
Volume
15
Which element, if neutral, can you expect to have 25 electrons?
Manganese
Lithium
Hydrogen
Magnesium
16
Why are nobel gasses nonreactive?
They don't mix easily
They don't have enough electrons
They have to many neutrons
They are chemically stable
17
The part of the atom that is mostly empty space is called the
Volume matrix
Electron Cloud
Nucleus
Mitocondria
18
How do we know how many rings to use in a bohr model?
The row number
The mass number
The atomic number
The group number
19
Isotopes are
Atoms of the same element with different atomic numbers
Different elements
Atoms of the same element with a different number of electrons
Atoms of the same element with different mass numbers
20
The average atomic mass is
The weighted average of the masses of all the known isotopes
Always the same as the most common isotope
The weighted average of the atomic numbers
The mass of the least common isotope
21
Which part of the atom is positively charged?
An atom has no charge
Energy levels
Nucleus
Electron cloud

Unit 3: The Atom (PS) Flashcards | StudBud