Test - Atomic Structure

Question 1

1. Substance that cannot be broken down chemically into other substances are

Answer 1

Elements Nb pg13

Question 2

2. The measurement of how much matter an object contains is its

Answer 2

Mass Nb pg7

Question 3

4. Each family in the periodic table has its own characteristic properties based on the number of

Answer 3

Valence electrons Nb pg13

Question 4

6. The atomic number of magnesium is 12. Therefore its nucleus must contain

Answer 4

12 protons and no electrons Nb pg7

Question 5

7. A neutral atom may contain 8 protons

Answer 5

9 neutrons and 8 electrons Nb pg13

Question 6

10. The farther an electron is from the nucleus, the more ________ it has

Answer 6

Energy Nb pg6

Question 7

15. The total number of neutrons in the nucleus of an atom is equal to

Answer 7

Mass number minus atomic number Nb pg6

Question 8

19. Which of the following is a transition metal

Answer 8

Nickel Nb pg14

Question 9

20. Which words below is represented by the word period on the periodic table

Answer 9

Energy levels Nb pg15

Question 10

21. The nucleus of an atom has all the following characteristics except that it

Answer 10

Contains nearly all of the atoms mass Nb pg3

Question 11

22. An atom is electrically neutral because

Answer 11

The numbers of protons and electrons are equal Nb pg 12

Question 12

25. When looking at the halogens on the periodic table how does the number of valence electrons change as the energy level increased

Answer 12

The total number of valence electrons does not change. It remains at 7 Nb pg16

Question 13

30. Which of the following elements would be the best conducted of electricity

Answer 13

Silver Nb pg16

Question 14

34,35,36. How do you find the mass number

Answer 14

Protons + neutrons Nb pg12

Question 15

41. Who arranged the elements on the periodic table based on its atomic mass

Answer 15

Dmitri Mendeleev Nb pg3

Question 16

43. Who said that electrons travel in fixed orbits around the nucleus of the atom

Answer 16

Neil’s Bohr Nb pg4

Question 17

45. List three elements from the group containing the most reactive metal

Answer 17

F, Cl, Br, I, At Nb pg16

Question 18

46. In each period how does the number of electrons in each kind of atom change from left to right between groups 1 and 2? Explain how you know

Answer 18

Atoms electrons increase by one because protons increase by one Nb pg13

Question 19

50. Describe one similarity and one difference between the two atoms that I drew. Include why each difference and similarity is expected, based on each elements location on the periodic table

Answer 19

Same = number of valence electrons

Difference = number of energy levels Nb pg16

Question 20

51. An isotope of Carbon has 7 neutrons
    a. Write this isotopes notation in nuclear form
    b. Write this isotopes notation in hyphen form
    c. Is this the most common form of the isotope? Explain how you know if it is or isn’t

Answer 20

a. 13c
b. Carbon - 13
c. No, because average atomic mass is 12.011 Nb pg16

Question 21

52.

a. This element is in the same family as Br, but has fewer protons than Mg. It must be

Answer 21

F Nb pg16

Question 22

52.

b. This element has 6 energy levels and 8 valence electrons. It must be

Answer 22

Rn Nb pg16

Question 23

52

d. This element is in the family with the most reactive nonmetals and has 4 energy levels. It must be

Answer 23

Br Nb pg16

Question 24

54. Property of metals

Answer 24

Good conducter Nb pg14

Question 25

54. Property of nonnmetals

Answer 25

Poor conductors Nb pg14

Question 26

54. Property of metalloids

Answer 26

Semi conductors Nb pg15