Chemistry help plz?

Question

1.What do the elements in a group have the same number of?
a. electrons
b.occupied energy levels or shells
c.electrons in the highest occupied energy level or outer shell.

and also if you know.

2. What do the elements in a peroid have the same number of?
a. electrons
b.occupied energy levels or shells
c. electrons in the highest occupied energy level or outer shell.


Please explain the answer because i want to understand it
THANK YOU.

Answer 1

1= b

2=c

in a period the number of shells remain the same
in a group the number of outermost electron remain the same

y they do that is complicated

Answer 2

The first question's answer is c.electrons in the highest occupied energy level or outer shell.
Elements in the same group have the same number of valence electrons or outer shell electrons as the same group number.
For example, in Group I, lithium, potassium and sodium have one valence electron.
Lithium - 2.1
Potassium - 2.8.8.1
Sodium - 2.8.1

Also, elements in the same group have same chemical and physical properties, including same number valence or outer shell electrons

The second question's answer is b.occupied energy levels or shells.
It is because elements in same periods but different groups have same number of shells. Elements in the same period has the same number of shells as the period number.
For example, in period 2, lithium,beryllium,boron and carbon have 2 shells.
Lithium - 2.1
Beryllium - 2.2
Boron - 2.3
Carbon - 2.5
=^-^=

Answer 3

1. Elements in a group have the same number of electrons in tne outer shell. So they have the same properties. Example : in group 1A called alcalins , there is one electron on the outer shell so all elements of that group tend to give that electron forming a positive ion

2. Answer b they have the same shells occupied . So period 2 goes from Li to Ne and correspond to the occupation of shell L
(n=2)

keep the link

Answer 4

The first answer is c. for instance all the elements in Group 1 have an alectron in the s orbital

the second answer is b.all the elements in the same period have electrons in the same energy level.

always remember that no 2 elements have the same number of electrons unless if they are isotopes

Answer 5

1. a. electrons
2. b. occupied energy levels or shells

Answer 6

this question isnt very clean. If each and all of the strategies are saturated then answer 2 has extra advantageous solubility. it may dissolve extra solute in step with unit volume, and consequently has extra advantageous solubility.

Answer 7

1. c
2. b.

i had to think a little on that one,
but that's good.
keeping my brain from rotting over
summer vacation!!
:D