Chemistry Unit Two

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The atomic mass for cadmium is

112.41

How many electrons are in each neutral atom of magnesium.

12

an atom of ^25Mg contains how many protons

12

How many protons and neutrons are in an atom of calcium-46

20 protons, 26 neutrons

How many protons are in nickel

28

How many neutrons are in Manganese-54

29

predict the charge that aluminum ion would have

3+

predict the charge that an an ion formed from Nitrogen would have.

3-

How many electrons does the As^3- ion possess

36

How many electrons does the Se^2- ion possess

36

The atomic number of an atom of ^130Xe is

54.

an atom of ^13C contains how many protons

6

How many protons and neutrons are in an atom of 227 89 Ac

89 Protons, 138 neutrons

Silver

Ag

protons=47, neutrons=62, electrons=46

Ag^+

Which of the following statements is false according to Daltons Atomic theory

An atom of nitrogen can be broken down into smaller particles the will still have the unique properties of nitrogen.

What is the chemical symbol for Carbon

C

Identify the equipment that Thomson utilized to do his research

Cathode Ray Tube

protons=17, neutrons=18, electrons=18

Cl^-

Give the symbol for potassium

K

protons=12, neutrons=14, electrons=10

Mg^2+

What is the chemical symbol for molybdenum

Mo

Identify the discovery that Millikan made

The charge of a single electron

What is the chemical symbol for Thallium

Tl

An ion has 26 protons, 29 neutrons, and 23 electrons. The symbol for the ion is

^55Fe^3+

Identify an anion.

an atom that has gained an electron

Identify a cation

an atom that has lost an electron

An atom that has an atomic number of 38 and a mass number of 88 is an isotope of an atom that has

an atomic number of 38 and a mass number of 86

Identify the discovery that Thomson made

an electron

80 X 35

bromine

protons, neutrons, electrons= 20

calcium

protons=17, neutrons=20, electrons=17

chlorine

What does "X" stand for in the following symbol 65 X 29

copper

The atomic number is equal to

number of protons

Identify the equipment that Millikan utilized to do his research

oil atomizer, light source, microscope

Identify the description of an atom

protons and neutrons in nucleus; electrons in orbitals

25 X 12

protons=12, neutrons=13, electrons=12

40 X 18

protons=18, nitrogen=22, electrons=18

65 X 29

protons=29, neutrons=36, electrons=29

Which element has the chemical symbol, Rn

radon

28 X 14

silicon

protons=11, neutrons=12, electrons=11

sodium

The mass of a number is equal to

sum of the number of protons and neutrons

ions differ in

the number of electrons

Which element has the chemical symbol, Sn

tin

Identify the element that has the atomic number of 40

zirconium


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