Periodic Trends

Question 1

As the elements in group 15 are considered in increasing atomic number, the

Accepted Answer

first ionization energy decreases

Question 2

The sequence of properties as atomic numbers increase in period 3

Accepted Answer

metal -> metalloid -> nonmetal -> noble gas

Question 3

The energy required to remove an electron from an atom's outer shell is called

Accepted Answer

first ionization energy

Question 4

Compared to the entire atom, the nucleus of the atom is

Accepted Answer

smaller and contains most of the atom's mass

Question 5

Which of these atoms would have the highest electronegativity?

Accepted Answer

Chlorine

Question 6

The reason that Fluorine is more electronegative than Beryllium is

Accepted Answer

F's nuclear charge is bigger but the number of electron shells stays same

Question 7

How many electrons are in N3-

Accepted Answer

10

Question 8

Moving across period 2 from left to right, the radius of each successive atom is

Accepted Answer

smaller, and nuclear charge is greater

Question 9

Which ion has the largest radius?

Accepted Answer

K+

Question 10

Which of the following particles has the smallest radius

Accepted Answer

Na+

Question 11

which elements are in the unknown sample mixture?

Accepted Answer

B and C

Question 12

How many total electrons are in the ion Mg2+

Accepted Answer

10

Question 13

The tendency of an atom to hold on to electrons in a bond is called

Accepted Answer

electronegativity

Question 14

Which halogen is most reactive?

Accepted Answer

F

Question 15

Which has the higher first ionization energy?

Accepted Answer

Fluorine

Question 16

As you move from left to right across the period, atomic radius

Accepted Answer

decreases

Question 17

Compared to the atoms of nonmetals in period 3, the atoms of metals in period 3 have

Accepted Answer

fewer valence electrons

Question 18

Which ion has the largest radius?

Accepted Answer

F-

Question 19

A possible excited state electron configuration for Chlorine is

Accepted Answer

2-8-6-1

Question 20

Atoms in a metal are held together through

Accepted Answer

metallic bonding

Question 21

The atomic number of an atom is always equal to the number of

Accepted Answer

protons in the nucleus

Question 22

Which of the following particles has the least mass?

Accepted Answer

electron

Question 23

What happens to atomic size as we move down group?

Accepted Answer

atomic radius increases

Question 24

Which is the correct order of atoms in ascending order of electronegativity?

Accepted Answer

N O F

Question 25

As the elements in Group 17 are considered from top to bottom

Accepted Answer

electronegativity decreases

Question 26

Which trends are observed as elements in Group 15 are considered from top to bottom?

Accepted Answer

Their electronegativity decrease and atomic radii increase

Periodic Trends

Questions 26

Periodic Trends

Questions 26