Pre Test Atomic Structure

1. What is the atomic number for hydrogen?

1

2

3

4

5

The atomic number is the larger number associated with the element. In this case, it's 1.

Explanation

The atomic number is the larger number associated with the element. In this case, it's 1.

2. What is the chemical symbol for calcium?

Cl

C

Ca

Cu

Cr

3. How many protons are in nickel?

3

8

31

28

24

Atomic # = # of protons

Explanation

Atomic # = # of protons

Submit

5. Electrons are found

Inside nucleus

Outside nucleus

With protons

With neutrons

6. The atom oxygen has a neucleon number of 16 and a proton number of 8. what is the number of neutrons in the oxygen atom?

4

16

8

0

7. Carbon-12 and Carbon-14 are _______________.

Ions

Isotopes

Different elements

Compounds

8. Mass number refers to:

The number of protons in the nucleus of an atom.

The number of electrons in an atom.

The number of neutrons in an atom.

The total number of protons and neutrons in the nucleus of an atom.

9. How many electrons does Californium have?

96

92

97

98

99

10. What is Californium's atomic number?

96

97

98

99

100

11. What is the formula for calculating the number of neutrons in an element?

Atomic mass - atomic number

Atomic number - atomic mass

Atomic weight - atomic mass

Atomic mass - atomic weight

# of protons - # of electrons

12. An element, X, has the following electron configuration: 2, 5

The atomic number of element X would be:

2

5

7

3

13. “Isotopes are elements that have the same number of neutrons and different number of protons.” What is wrong with the previous sentence?

Isotopes are elements that have the same number of protons and different number of neutrons.

Isotopes are elements that have the same number of protons and different number of electrons.

Isotopes are elements that have the same number of neutrons and different number of electrons.

Isotopes are elements that have the same number of electrons and different number of protons.

14. Element X has a nucleon number of 40 and a proton number of 20. Which period in the periodic table is X found in?

Period 4

Period 1

Period 7

Period 5

15. What type of element is Potassium?

Metal

Non-metal

Metalloid

Noble Gas

Halogen

16. How many protons does Californium have?

96

97

99

98

100

17. Which of the following statements regarding atomic particles is false?

Protons are found in the nucleus and are positively charged particles

Electrons move around the nucleus and contribute little to the mass of the atom

Neutrons are found in the nucleus and they have no charge

The numbers of neutrons, protons and electrons are always equal in a neutral atom

18. Hydrogen, deuterium and tritium are all isotopes of hydrogen. They have a different number of _____________.

Atoms

Neutrons

Protons

Electrons

19. The electron configuration: 2, 8, 4 is that of:

Carbon

Nitrogen

Neon

Silicon

20. What is the atomic mass of phosphorus?

15

31

2

18

16

21. How many neutrons does Be have?

4

5

6

7

9

22. How many netrons does Californium have?

110

153

98

251

1

23. Element P has a nucleon number of 31 and a proton number of 15. Eement S has a nucleon number of 32 and a proton number of 16. The two elements have the same __________.

Number of protons

Number of neutrons

Nucleon number

Number of electrons

24. Calculate the number of protons, neutron, and electrons in an atom of Beryllium which has an atomic number of 4 and an atomic mass of 9.

4, 4, 4

4, 5, 5

4, 5, 13

4, 5, 4

25. The number of valence electrons in an atom is equal to

The number of electrons in the atom.

The charge on a positive or negative ion formed by that atom.

The number of electrons in the outer energy level of the atom.

The number of electrons needed to fill all the energy levels of the atom.

26. An atom has very little empty space.

True

False

27. The element chlorine has an electron configuration of 2,8,7. It is in which group and period ?

Group 7 and period 3

Group 17 and period 4

Group 3 and period 17

Group 3 and period 7

28. The electron configuration for Al³⁺ is

2, 8, 3

2, 8

2, 8, 6

2, 8, 2

29. Which group contains elements that are chemically stable?

1

2

8

12

30. The Lewis Dot diagram for Carbon would have how many dots (valence electrons)?

2

3

4

5

6

31. What is Californium's atomic mass?

247

251

252

257

32. A beam of particles containing protons, neutrons and electrons is fired through an electric field. Which particle will not bend or deviate?

Proton

Electron

Neutron

All of the above

33. Which of the following species does NOT have a stable electron configuration (i.e. like those of an inert gas)?

Cl-

K+

Al3+

Mg+