Atoms & Elements

Question 1

Due to the discovery of the nucleus by Rutherford, which model of the atom is considered true?

Accepted Answer

The nucleus has all the +charge &most of the mass of an atom

Question 2

Which set of elements compose the star?

Accepted Answer

H & He

Question 3

How many valence electrons does Germanium have?

Accepted Answer

4

Question 4

How many neutrons are in an isotope of Titanium with a mass of 53?

Accepted Answer

31

Question 5

The Bohr model is best described as

Accepted Answer

electrons orbiting the nucleus like planets orbit the sun

Question 6

In a Lewis-Dot diagram, which element would have 3 dots drawn around it?

Accepted Answer

Indium

Question 7

The Modern Periodic Table improved Mendeleev's table by

Accepted Answer

using repeated properties of elements

Question 8

What type of orbital is shown in the image?

Accepted Answer

P

Question 9

How did Rutherford determine there was nucleus in the atom?

Accepted Answer

He used alpha particles and gold foil

Question 10

How many protons are in an element with a mass of 158 and 71 neutrons?

Accepted Answer

87

Question 11

Calculate the average atomic mass.

Accepted Answer

22.14 amu

Question 12

Which of these elements is classified as ONLY a nonmetal?

Accepted Answer

Sulfur

Question 13

What type of orbital is shown in the image?

Accepted Answer

f

Question 14

Knowing only the location or momentum of an electron but not both is best described as

Accepted Answer

Heisenberg's Uncertainty Principle

Question 15

What type of orbital type best represents Silver?

Accepted Answer

d

Question 16

Which element could be represented by the image?

Accepted Answer

Bromine

Question 17

Which electronegativity value best fits the chart for the element Strontium?

Accepted Answer

1.0

Question 18

Which set of lines represents the increase of ionization energy?

Accepted Answer

A

Question 19

Which set of lines represents the increasing of atomic radii?

Accepted Answer

B

Question 20

Which statement is true regarding atomic radius?

Accepted Answer

It decreases across a period (L to R)

Question 21

Who proposed this model?

Accepted Answer

Thomson

Question 22

Which of the following would most likely have the lowest Ionization Energy?

Accepted Answer

Rubidium

Question 23

Which element is expected to have a larger atomic radius?

Accepted Answer

Strontium

Question 24

Which is a key feature of the Quantum Mechanical Model of the atom?

Accepted Answer

Electrons have particle and wave properties

Question 25

What is the mass of an atom with 16 protons, 16 electrons, and 20 neutrons?

Accepted Answer

36

Question 26

Using the electron emission spectrum lines of gases, which gases are within the mixture?

Accepted Answer

Gas D & A

Question 27

Which of the following would most likely have the greatest electron affinity?

Accepted Answer

Phosphorus

Question 28

Which best represents how electrons are arranged in the energy levels of a oxygen atom?

Accepted Answer

1st level = 2 electron ; 2nd level = 6 electrons

Question 29

How many electrons are in an atom of Arsenic?

Accepted Answer

33

Question 30

When Sodium becomes an ion it...

Accepted Answer

loses one electron and becomes positive

Question 31

Find the average atomic mass.

Accepted Answer

36.34

Question 32

What is the correct electron configuration of Magnesium?

Accepted Answer

1s22s22p63s2

Question 33

The existence of line spectra can be explained by

Accepted Answer

electrons jumping and falling to and from specific orbits

Atoms & Elements

Questions 33

Atoms & Elements

Questions 33