C2 periodic table

Question 1

Why is mendeleevs table so good?

Answer 1

-He placed them in atomic weight
-Arranged periodically to show similar properties
-Left gaps in the table for undiscovered elements and predicted what they would be like based on similar elements
-Swapping out inconsistencies like argon and potassium so they can be in groups of elements with similar properties and not always based on mass

Question 2

Properties of metals

Answer 2

-Electrical conductor
-Ductile(drawn out to wires)
-Malleable (bent with a hammer)
-Higher melting/boiling point

Question 3

What happens with electrons in group 5 6 7

Answer 3

They gain electrons to form ions
anion( non metals) negative charge

Question 4

What happens with electrons in groups 123

Answer 4

They lose to form cations
(metals) positive charge

Question 5

Why are the noble gases so stable?

Answer 5

They have a complete outer shell so there is no need for them to react.

Question 6

Why does the boiling point get higher down the noble gases?

Answer 6

The atoms become larger. the intermolecular forces between the atoms become stronger. more energy is needed to overcome these forces.

Question 7

What are properties of Group 1-Alkali Metals?

Answer 7

Soft and very reactive,Low density and shiny

Question 8

Why do reactivity increase going down the alkali metals?

Answer 8

the atoms get larger. the outer electron gets further from the nucleus. the attraction between the nucleus and outer electron gets weaker – so the electron is more easily lost.

Question 9

What do alkali metals react well with/

Answer 9

Group 7-Halogens
example
sodium+chlorine–>Sodium chloride
or salt

Question 10

Properties of Halogens

Answer 10

Low boiling/melting point
Toxic
Poor conductors

Question 11

What would happen if you have potassium iodide and put it in chlorine solution?

Answer 11

The chlorine will displace the iodine from the potassium as chlorine is more reactive

Question 12

Why does group 7 get less reactive when you go down?

Answer 12

They increase in electron shells; so the atoms are larger as you go down the group. Therefore, the attraction of the outer electron to the nucleus decreases as you go down group 7.

Question 13

Properties of Transition Metals

Answer 13

Good conductors
Hard and Strong
High density
High melting point
Low reactivity

Question 14

Why do transition element may have a roman numeral next to their name?

Answer 14

Because they can form more than one ion