What is a coefficient in a chemical formula?

tells us how many molecules in the chemical formula.

Valence electrons . . .

are found in the outermost orbital shell of an atom.

An atom is the smallest particle of an element that . . .

has the chemical properties of the element.

What is the atomic weight #?

the sum of the neutrons and protons.

the group or column on the periodic table tells us what?

the amount of valence electrons of the elements.

How do you find the number of electrons in an atom?

Look at the atomic number on the periodic table

The row or period on the periodic table tells us what?

How many orbital shells the atom has.

is a group of atoms held together by chemical bonds.

How do you find the number of neutrons in an element?

subtract the atomic number from the atomic mass number

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Periodic table and atoms good one

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Answers

1
What is a coefficient in a chemical formula?
tells us how many atoms in the molecule.
tells us how many elements in the chemical formula.
tells us how many molecules in the chemical formula.
2
A neutron is . . .
neutral.
negatively charged.
positively charged.
3
In a balanced atom the number of protons equal . . .
the number of nucleus.
the energy levels.
the number of electrons.
the number of neutrons.
4
How many neutrons are in Neon?
1
10
20
5
Valence electrons . . .
are found in every orbital shell.
are found in the Rutherford model.
are in the nucleus.
are found in the outermost orbital shell of an atom.
6
An electron is . . .
neutral.
positively charge.
negatively charged.
7
An atom is the smallest particle of an element that . . .
has the chemical properties of the element.
that looks the same.
has different properties.
8
Ca is . . .
chemical name.
the atomic number.
the chemical symbol.
9
What is the atomic weight #?
the sum of the neutrons and electrons.
the sum of the neutrons and protons.
the sum of the electrons and protons.
10
The number of protons equals . . . .
the number of ions.
the number of neutrons.
the number of electrons.
11
A column of elements is called . . .
a period.
a zigzag line between metals and nonmetals.
a group or family.
12
the group or column on the periodic table tells us what?
the amount of neutrons in the nucleus.
the amount of valence electrons of the elements.
the amount of orbital shells of the element.
the amount of protons in the nucleus.
13
Who created this model?
Mendeleev
Rutherford.
Dalton.
Bohr.
14
Aluminum is . . .
average atomic mass.
the chemical symbol.
the atomic number.
element name.
15
A row of elements is called . . .
a period.
a group.
a family.
16
What element is this a model of?
Carbon
Boron
Oxygen
Lithium
17
How do you find the number of electrons in an atom?
Look at the atomic number on the periodic table
add the protons and neutrons
subtract the atomic number from the atomic mass number.
18
The row or period on the periodic table tells us what?
How many orbital shells the atom has.
How many protons the atom has.
the number of electrons the atom has.
how many valence electrons the atom has?
19
What is the atomic number?
The number of protons.
The number of neutrons.
The number of ions.
20
What is the subscript in this formula? 2CO₂
1
the little number 2
the big number 2
21
A molecule
forms when an atom gains or loses an electron.
is a group of atoms held together by chemical bonds.
is a bond formed by atoms sharing electrons.
22
How do you find the number of neutrons in an element?
subtract the atomic number from the atomic mass number
add the atomic mass and the atomic number together.
23
What is the coefficient in this chemical formula? 3H₂C₄
2
4
3
24
A proton is . . .
negatively charged.
neutral.
positively charged.

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