Question

Question #1

The name/symbol combination that is incorrect is ? .

1. arsenic/As

2. potassium/P

3. boron/B

4. nickel/Ni

5. silicon/Si

Question #2

The symbol for the element gold is

1. Go

2. G

3. A

4. Au

5. Ag

Question #3

The symbols Fe, Hg, N, Au, Ne have the

following names:

1. iron; mercury; nitrogen; gold; neon

2. fluorine; mercury; nickel; silver; neon

3. iron; mercury; nitrogen; silver; neon

4. fluorine; hydrogen; nitrogen; gold; neon

5. iron; hydrogen; nickel; gold; nitrogen

Question #4

Which isotope has the largest number of neutrons in the nucleus?

1. 130Te

2. 123Sb

3. 127I

4. 120Sn

Question #5

The isotope 65

29Cu has ? neutrons and ?

protons.

1. 29, 65

2. 36, 29

3. 65, 29

4. 29, 36

5. 29, 29

Question #6

Most of the naturally occuring elements are

1. nonmetals

2. halogens

3. metals

4. noble gases

5. metalloids

Question #7

The atomic number, which orders the elements in the periodic table, has been identified as ? of the atom.

1. the number of electrons in the nucleus

2. the number of protons in the nucleus

3. the sum of the number of protons and

neutrons in the nucleus

4. the number of neutrons in the nucleus

Question #8

According to the Periodic Law, which of the

following should have properties similar to

carbon?

1. B

2. H

3. Si

4. N

Question #9

All the elements in the second column of the

periodic table have a valence of +2.

1. False

2. True

Question #10

Fluorine, chlorine and bromine are members

of ? .

1. the inert gas group

2. the alkali metal group

3. the halogen group

4. the noble gas group

5. the alkaline earth metal group

Question #11

In the periodic table, a vertical column of

elements is called ? .

1. a group

2. an orbital

3. a period

4. a transition

5. a lanthanide

Question #12

The five thousand billion freely moving electrons in a penny repel one another.

Why don

Answer 1

1)
2. potassium/P
The chemical symbol of potassium is K
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2)
The symbol for gold is
4. Au
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3)
1. iron; mercury; nitrogen; gold; neon
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4)
Te atomic number 52
nutron number = mass number-atomic number = 130-52 = 78
for Sb
nutrons = 123-51 = 72
for I
nutrons = 127 - 53 = 74
for Sn
nutrons = 120 -50 = 70
isotope has the largest number of neutrons in the nucleus is

1. 130Te
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5)
Cu has 29 protons , nutrons =65-29=36
The Answer is
4. 29, 36
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6)
The Answer Is
3. metals
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7)
The Answer is
2. the number of protons in the nucleus
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8)
Answer
3.Si
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9)
Answer is
2.True
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10)
3.The Halogen Group
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11)
Answer is
1.a group
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12)
Answer is
As the electrons are having negative charges and protons inside
the nucleus have positive charge sok electrons are bounded towards
nucleus because of attractive force
The Answer is
5. They are attracted to the five thousand billion positively charged protons
in the atomic nuclei of atoms in the penny.
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13)
Classical Behaviour gives continous spectrum and quantum behaviour gives
descrete spectrum
The Answer is
2. continuous spectrum
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14)
Answer is
1. atomic spectra
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15)
Answer
15) 4. None of these
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