Atoms Etc.

Question 1

Which of the following does not have an electromagnetic charge?

Accepted Answer

neutron

Question 2

The electrons in the outermost orbital are called:

Accepted Answer

valence electrons

Question 3

Isotopes:

Accepted Answer

have the same # of protons but different # of neutrons

Question 4

Can the atoms of one element transform into atoms of another element?

Accepted Answer

no

Question 5

Which element has an electron configuration of 1s22s22p63s23p63d104s24p6?

Accepted Answer

Krypton

Question 6

How many valence electrons does Sodium (Na) have?

Accepted Answer

1

Question 7

Why don't noble gases react?

Accepted Answer

Their outer orbitals are completely full of electrons.

Question 8

Which of the following choices has a negligible mass?

Accepted Answer

electron

Question 9

What instrument can be used to see individual atoms?

Accepted Answer

scanning electron microscope

Question 10

Who created the Plum Pudding model?

Accepted Answer

Thomson

Question 11

What element does the electron configuration in the picture represent?

Accepted Answer

Oxygen

Question 12

What element does this electron cloud diagram represent?

Accepted Answer

phosphorus

Question 13

On which scientist's theory of the atom is our current theory based mostly?

Accepted Answer

Dalton

Question 14

Barium 138 (Ba-138) has how many neutrons?

Accepted Answer

82

Question 15

Uranium 235 (U-235) has how many protons?

Accepted Answer

92

Question 16

Which of the following choices could element X in the picture represent?

Accepted Answer

B & Ga

Question 17

How many electrons (arrows) can go in each box of each sub-level on a filling diagram?

Accepted Answer

2

Question 18

Which guys believed the atom resembled the picture shown?

Accepted Answer

Dalton and Democritus

Question 19

Chlorine's electron configuration is:

Accepted Answer

1s22s22p63s23p5

Question 20

What element does this electron cloud diagram represent?

Accepted Answer

sulfur

Question 21

Whose Gold Foil Experiment proved there were protons?

Accepted Answer

Rutherford

Question 22

Average atomic mass:

Accepted Answer

is found by multiplying percent abundance by atomic mass

Question 23

The center of an atom contains:

Accepted Answer

protons and neutrons

Question 24

If an element has an atomic number of 29 and mass = 67, how many neutrons does it have?

Accepted Answer

38 neutrons

Question 25

Why do atoms have a neutral electrical charge?

Accepted Answer

protons and electrons balance each other out

Question 26

Why are valence electrons the only ones included in an electron dot diagram?

Accepted Answer

They tell us if an atom can bond/how many times it can bond.

Question 27

The center of an atom is called:

Accepted Answer

nucleus

Question 28

When filling in the electron (orbital) filling diagram for p, d, or f orbitals, you:

Accepted Answer

draw arrows going one direction in each box first

Question 29

Two electrons will:

Accepted Answer

repel each other

Question 30

______ are located in energy orbitals around the nucleus.

Accepted Answer

electrons

Atoms Etc.

Questions 30

Atoms Etc.

Questions 30