Chemistry, Standard 1, Objective 3

ChemistryStandard 1, objective 3

Use the model periodic table provided to answer questions .

a1. What number of protons does the element “X” have?

A. 1 B. 4C. 15D. 19

a2. If “X” has an atomic mass is 39, how many neutrons does it have?

A. 4B. 8C. 20D. 22

a3. How many electrons does “X” have?

A. 1B. 4C. 15D. 19

c4. What similarities would you expect to see between “Z” and other elements in its group? They would have similar:

A. atomic number

B. properties

C. names

D. atom mass

c5. What element on the table would you expect to be most chemically similar to “X”?

A. VB. YC. XD. W

a6. How are “X” and “V” alike?

A. their electrons have the same number of energy levels

B. they have the same number of electrons

C. they are the same size

D. they have isotopes with the same number of protons

d7. “X” and “W” are tested by placing a small piece of them in water. What would you expect to see happen?

A. X and W will react the same in water

B. X will react more strongly than W

C. W will react more strongly than X

D. X will react and W will not.

c8. Chemists are looking for a non-reactive substance to fill a soft container to maintain its shape. Which element would be the best substance?

A. X

B. V

C. U

D. Z

e9. Which substances would you group together as metals?

A. Y, Z, U

B. X, V, W

C. X, W

D. Y, V, X, W

e10. Which group of elements includes gases and does not conduct electricity or heat well?

A. metals

B. metalloids

C. nonmetals

D. radioactive elements

e11. Which element(s) would be classified as metalloids?

A. Z

B. Y

C. Z, Y

D. W, X

Use this information to answer the next three questions:

b12. What can you predict about its average atomic mass?

A. It is closer to 127 than 128

B. It is closer to 128 than 127

C. it is between 127 and 128

D. it is below 127

b13. How many protons and neutrons does the Y127 isotope have?

A. 52 protons, 75 neutrons

B. 75 protons, 52 neutrons

C. 63 protons, 64 neutrons

D. 63 neutrons, 64 protons

b14. If “Y” only has a small percentage of atoms that are Y127, what can you predict about its average atomic mass?

A. It is closer to 127 than 128

B. It is closer to 128 than 127

C. it is between 127 and 128

D. it is below 127

Use a Periodic Table to answer the following questions.

a15. How many protons does the isotope Carbon-13 have?

A. 6

B. 11

C. 12

D. 13

a16. How many electrons orbit a Calcium atom?

A. 2

B. 20

C. 40.8

D. 6.02 x1023

a17. How many neutrons are in the nucleus of most Fluorine atoms?

A. 7

B. 9

C. 10

D. 19

b18. Deuterium and Tritium are isotopes of Hydrogen. What structural feature of these isotopes makes them different?

A. The number of neutrons

B. The number of protons

C. The number of electrons

D. The type of bond they form

d19. Which statement about reactivity trends in groups of the periodic table is correct?

A. Reactivity is the same for each element in a group.

B. Reactivity increases and then decreases in each group.

C. Reactivity decreases going down each group.

D. Reactivity increases going down each group.

d20. Elements in the halogen group (group 7) all share what characteristic?

A. They all have similar reactivity

B. Their size is the same

C. They have three isotopes

D. They are all gasses

Key

1. D

2. C

3. D

4. B

5. D

6. A

7. C

8. D

9. B

10. C

11. B

12. C

13. A

14. B

15. A

16. B

17. C

18. A

19. D

20. A