a cation of Hydrogen has a +1 Charge. What would cause this?

A Hydrogen atom LOST an electron

The periodic table is arranged so elements that have similar chemical and physical properties

are in the same vertical column (group)

Fluorine's atomic number is 9 so

it has 9 protons and 9 electrons

Which of these values is NOT needed to calculate the atomic mass (the weighted average mass)

how many electrons each isotope has

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Ch. 4 Atomic Structure

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Structure of an atom, Atomic Models, Subatomic particles

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Answers

1
a cation of Hydrogen has a +1 Charge. What would cause this?
A Hydrogen atom LOST an electron
A Hydrogen atom GAINED an electron
this is just how it occurs in nature
A Hydrogen atom LOST a proton
2
What Atomic Model is this?
Dalton's "Billiard Ball" Model
Rutherford's Model
Thomson's "Plum Pudding" Model
Bohr's Model
3
How do you find the number of neutrons in an atom?
Protons + Electrons
it is the same as the Mass Number
Mass Number - Atomic Number
by calculating Weighted Atomic Mass
4
Which is NOT part of Dalton's Atomic Theory?
In a chem. reaction atoms are separated/joined/rearranged
All elements are composed of particles called atoms.
Atoms of the same element are identical
Atoms are always in Motion
5
Oxygen has 8 protons and a mass number of 16 how many neutrons does it have?
none
8
16
10
6
Relative Atomic Mass of an atom is measured in
Grams
AMUs
Liters
Nanograms
7
The periodic table is arranged so elements that have similar chemical and physical properties
no elements are similar
are in the same horizontal row (period)
have the same atomic number
are in the same vertical column (group)
8
Fluorine's atomic number is 9 so
it has 18 protons and 18 electrons but only 9 neutrons
it has 4 protons and 5 electrons (4+5=9)
it has 9 protons and 9 electrons
it has 8 protons and 1 electron
9
Which of these values is NOT needed to calculate the atomic mass (the weighted average mass)
how many electrons each isotope has
the number of stable isotopes of the element
the natural percent abundance of each isotope
the mass of each isotope
10
What Atomic Model is this?
Bohr's Model
Rutherford's Model
Dalton's "Billiard Ball" Model
Thomson's "Plum Pudding" Model
11
Which of these is NOT a subatomic particle
electrons
neutrons
protons
nucleus
12
Atoms with the same number of protons but different number of Neutrons are called
Isotopes
Electrons
Ion
Atom
13
The nucleus of an atom is...
Has a low density
Negatively charged
Positively Charged
Has no charge
14
Electrons
have a positive charge
are located in the nucleus
have almost no mass
are stationary on elliptical orbits
15
Atomic Number= Number of Protons = Number of Electrons
True
False
16
Neutrons
have mass and a positive charge
have almost no mass and no charge
have almost no mass and a negative charge
have mass and no charge
17
All atoms of the same element have the same
mass number
mass
number of protons
number of neutrons
18
All of Dalton's Theories are still accepted, and have been proven completely correct.
True
False
19
How did Democritus describe the atom?
inalienable and indissoluble
indivisible and indestructible
impenetrable and interwoven
inseparable and integral
20
Which of these elements would be chemically similar to Oxygen (O)
Hydrogen (H)
Sulfur (S)
Magnesium (Mg)
Nitrogen (N)

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