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Question : 51) The element in this list with chemical properties similar

51) The element in this list with chemical properties similar to magnesium is

A) sodium.

B) boron.

C) carbon.

D) strontium.

E) chlorine.

52) Identify the noble gas in the following list.

A) helium

B) nitrogen

C) oxygen

D) gold

E) chlorine

53) Semiconductors are located in the periodic table on (or in) the

A) left side of the table.

B) right side of the table.

C) line dividing metals from nonmetals in the table.

D) first period of the table.

E) last period of the table.

54) Identify the metalloid in the following list.

A) sulfur

B) fluorine

C) silver

D) copper

E) germanium

55) The number of valence electrons found in an atom of a Group A element is equal to

A) its atomic number.

B) its mass number.

C) its group number.

D) eight.

E) eight minus the group number.

56) Valence electrons are electrons located

A) in the outermost energy level of an atom.

B) in the nucleus of an atom.

C) in the innermost energy level of an atom.

D) throughout the atom.

E)  in the first three shells of an atom.

57) In an electron-dot symbol of an element, the dots are used to represent

A) all of the electrons in the atom.

B) the valence electrons.

C) the electron arrangement.

D) only the electrons that will participate in bond formation.

E) the electrons that the element will gain when it forms a compound.

58) How many valence electrons are in the electron-dot symbols for the elements in group 3A(13)?

A) 1

B) 2

C) 3

D) 4

E) 6

59) The number of dots in the electron dot symbol of nitrogen is

A) one.

B) two.

C) three.

D) four.

E) five.

60) The number of dots in the electron dot symbol of carbon is

A) one.

B) two.

C) three.

D) four.

E) fiv


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