Elements

Question 1

Element As:

name:

atomic number:

atomic mass:

group:

period:

Answer 1

Element As:

name:
arsenic

atomic number:
33

atomic mass:
74.92 amu

group:
15

period:
4

Question 2

Element francium:

symbol:

atomic number:

atomic mass:

group:

period:

Answer 2

Element francium:

symbol:
Fr

atomic number:
87

atomic mass:
223
amu

group:
1

period:
7

Question 3

Element tantalum:

name:

atomic number:

atomic mass:

group:

period:

Answer 3

tantalum

symbol:
Ta

atomic number:
73

atomic mass:
180.9
amu

group:
5

period:
6

Question 4

No

name:

atomic number:

atomic mass:

group:

period:

Answer 4

No

name:
nobelium

atomic number:
102

atomic mass:
259
amu

group:
3

period:
7

Question 5

Select all the pairs of elements that have similar properties.

Cs and Na
He and Ho
Mg and Xe

Answer 5

Cs and Na

Question 6

As

metallic character:
electron configuration:

Answer 6

As

metallic character: metalloid
electron configuration: representative element

Question 7

francium

metallic character:
electron configuration:

Answer 7

francium

metallic character: metal
electron configuration: representative element

Question 8

No

metallic character:
electron configuration:

Answer 8

No

metallic character: metal
electron configuration: inner transition metal

Question 9

tantalum

metallic character:
electron configuration:

Answer 9

tantalum

metallic character: metal
electron configuration: transition metal

Question 10

True or False: A substance labeled as KCl is classified as an element.

Answer 10

False

Question 11

For the element with the chemical symbol Si, what is its name, atomic number, atomic mass, group, and period?

Answer 11

For the element with the chemical symbol Si, what is its name, atomic number, atomic mass, group, and period?

name:
Silicon

atomic number:
14

atomic mass:
28.09 amu (28.0855 amu)

group:
14

period:
3