The periodic table and perioidc trends

Question 1

How many valence electrons does silicon have?

Accepted Answer

4

Question 2

What scientist discovered a connection between atomic mass and elements' properties?

Accepted Answer

Mendeleev

Question 3

The modern periodic table is arranged by increasing ____________?

Accepted Answer

atomic number

Question 4

Which of the following is a halogen?

Accepted Answer

Bromine

Question 5

Which element is a gas at room temperature

Accepted Answer

Chlorine

Question 6

Who discovered a unique number of protons called the atomic number.

Accepted Answer

Mosley

Question 7

As one moves down a family on the periodic table the Ionization energy _______?

Accepted Answer

Decreases

Question 8

Which element is the least reactive?

Accepted Answer

Helium

Question 9

Whose periodic table left gaps for future discovered elements?

Accepted Answer

Mendeleev

Question 10

Which element has the same valence electrons as Silicon?

Accepted Answer

Tin

Question 11

Which element has 5 valence electrons?

Accepted Answer

Arsenic

Question 12

Which of the elements listed is the least reactive on the periodic table?

Accepted Answer

Krypton

Question 13

Which element is a metalloid?

Accepted Answer

Antimony

Question 14

How many more days until Christmas?

Accepted Answer

13

Question 15

Which element has the smallest ionization energy?

Accepted Answer

Tellurium

Question 16

Which of the following is an alkali metal?

Accepted Answer

sodium

Question 17

Which element has 2 valence electrons?

Accepted Answer

Helium

Question 18

The modern periodic table has ________ periods

Accepted Answer

7

Question 19

Which element has the largest atomic radius?

Accepted Answer

Indium

Question 20

What element has the smallest atomic radius?

Accepted Answer

Fluorine

Questions 20