The Periodic Table

Question 0

What is the periodic law?

Answer 0

The properties of the elements repeat periodically.

Question 1

By what property did Moseley suggest that the periodic table be arranged?

Answer 1

Atomic Number

Question 2

What is a period?

Answer 2

A horizontal row.

Question 3

How many periods are there in a periodic table?

Answer 3

Seven

Question 4

What is a group?

Answer 4

A column in the periodic table

Question 5

How many columns are there in the periodic table?

Answer 5

Eighteen.

Question 6

Where are the transition elements?

Answer 6

Groups 3-12

Question 7

In what orbitals are the actinide and lanthanide electrons found?

Answer 7

F orbitals.

Question 8

What makes chemicals more similar to one another?

Answer 8

The same amount of valence electrons.

Question 9

What named group is for the following valence shell electron configurations? s2

Answer 9

Alkaline Earth Metals

Question 10

s2p6

Answer 10

Noble Gases.

Question 12

What do we mean by the “atomic radius”?

Answer 12

The size of a neutral atom.

Question 13

What happens to the atomic radius as you go down a column?

Answer 13

Gets bigger.

Question 14

Why does the atomic radius change?

Answer 14

The element below has one more energy level than the one above.

Question 15

Within a period, what happens when you go left to right?

Answer 15

Decreases.

Question 16

Why does the atomic radius decrease as you go left to right?

Answer 16

No additional energy levels, more charges = more pull.

Question 17

How are neutral atoms converted into cations?

Answer 17

They lose electrons.

Question 18

How are neutral atoms converted into anions?

Answer 18

Gains electrons.

Question 19

Metals usually form _______ ions.

Answer 19

Cations.

Question 20

Nonmetals usually form _________ ions.

Answer 20

Anions.

Question 21

What is ionisation energy?

Answer 21

The energy required to remove an electron from an atom.

Question 22

What is the first ionisation energy?

Answer 22

Energy required to remove the 1st electron.

Question 23

Why does each successive ionisation require more energy than the previous one?

Answer 23

The nucleus holds on tighter to the fewer remaining electrons.

Question 24

As you go left to right, what happens to ionisation energy?

Answer 24

Increases.

Question 25

As you go down a group on the periodic table, what happens to ionisation energy?

Answer 25

Decreases.

Question 26

When an atom becomes an anion, what happens to its radius?

Answer 26

Grows bigger.

Question 27

When an atom becomes a cation, what happens to its radius?

Answer 27

Becomes smaller.

Question 28

Where are the metals on the periodic table?

Answer 28

Left side.

Question 29

Where are the non metals on the periodic table?

Answer 29

On the right.

Question 30

What is electronegativity?

Answer 30

The tendency for an atom to attract electrons to itself.

Question 31

What is the general trend of electronegativity as you go down the periodic table?

Answer 31

Decreases.

Question 32

What is the trend of electronegativity as you go left to right across the periodic table?

Answer 32

Increases.

Question 43

Why do all members of a group have similar properties?

Answer 43

They have the same number of valence electrons.