Test- Atomic Structure

Question 1

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

Answer 1

Mass pg. 4

Question 2

5. What is the greatest number of valence electrons an atom can have?

Answer 2

8 pg. 11

Question 3

13. The total number of electrons in the outer shell of a sodium atom is

Answer 3

1 pg. 9

Question 4

14. Which particles determine the atomic number of an element?

Answer 4

protons only pg. 7

Question 5

20. Which word below is represented by the word “period” on the Periodic Table?

Answer 5

energy level pg. 16

Question 6

22. An atom is electrically neutral because

Answer 6

the numbers of protons and electrons are equal pg. 7

Question 7

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

Answer 7

the total number of valence electrons does not change. It remains at 7. pg. 16

Question 8

30. Which of the following elements would be the best conductor of electricity?

Answer 8

silver pg.16

Question 9

31. Which of the following elements would be the most reactive?

Answer 9

iodine pg. 16

Question 10

32. Which of the following elements would be the least reactive

Answer 10

silicon pg. 16

Question 11

33. With the exception of helium, group 18 elements usually have ———- valence electrons, so they do not usually react with other elements

Answer 11

eight pg. 16

Question 13

34. Group name for 1

Answer 13

Alkali metals pg. 16

Question 14

35. Group name for 18

Answer 14

Noble gasses pg. 16

Question 15

36. Group name 17

Answer 15

Halogens pg. 16

Question 16

37. Arranged the elements on the periodic table based on atomic number

Answer 16

Henry Mosely pg. 3

Question 17

38. Solid Sphere Model; elements are atoms with different masses

Answer 17

Dalton pg. 3

Question 18

39. Electron cloud model; surrounding the nucleus is an electron cloud made of shells- electrons do not, however, travel in a fixed orbit.

Answer 18

Shrodinger and Heisenberg pg. 3

Question 19

40. Nuclear Model; Gold foil experiment allowed him to discover that the nucleus was the positively charged center of the atom surrounded by negatively charged electrons.

Answer 19

Ernest Rutherford pg. 3

Question 20

51. An isotope of Carbon has 7 neutrons.

c. Is this the most common form of the isotope? Explain how you know if it is or is it.

Answer 20

It is because it’s protons and neutrons are equaly balanced. pg. 16

Question 21

52. Use the following clues and the periodic table to determine the identity of each element described below.
    b. This element has six energy levels and eight valence electrons. it must be?

Answer 21

Radon pg. 16

Question 22

54. Classify the following elements as metals, nonmetals, or metalloids. Include one characteristic of each type. Use the chart on the answer sheet.

Answer 22

Property of nonmetals- poor conductors

pg. 14

Question 23

54. Classify the following elements as metals, nonmetals, or metalloids. Include one characteristic of each type. Use the chart on the answer sheet.

Answer 23

Property of metalloids- semi- conductors

pg. 15

Question 24

41. Arranged the elements on the periodic table based on atomic mass.

Answer 24

Dmitri Mendeleev pg. 3