![element cards](https://onlinesciencenotes.com/wp-content/uploads/2020/05/element-cards.jpg)
ELEMENT : HYDROGEN
SYMBOL: H
ATOMIC NUMBER: 1
ATOMIC MASS: 1 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 1 | – | – | – |
SUBSHELL ELECTRONIC CONFIGURATION: 1s2
VALENCY: 1
GROUP: IA(1) PERIOD:1ST
BLOCK: s
ELEMENT : HELIUM
SYMBOL: He
ATOMIC NUMBER: 2
ATOMIC MASS: 2 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | – | – | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2
VALENCY: 0 (Duplet State)
GROUP: VIIIA(0)or 18 PERIOD:1ST
BLOCK: p
ELEMENT : LITHIUM
SYMBOL: Li
ATOMIC NUMBER: 3
ATOMIC MASS: 7 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 1 | – | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s1
VALENCY: 1
GROUP: IA or 1 PERIOD:1ST
BLOCK: s
ELEMENT : BERYLLIUM
SYMBOL: Be
ATOMIC NUMBER: 4
ATOMIC MASS: 9 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 2 | – | – |
![](https://onlinesciencenotes.com/wp-content/uploads/2020/05/berylium.jpg)
1s2,2s2
VALENCY: 2
GROUP: IIA or 2 PERIOD:2nd
BLOCK: s
ELEMENT : BORON
SYMBOL: B
ATOMIC NUMBER: 5
ATOMIC MASS: 11 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 3 | – | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p1
VALENCY: 3
GROUP: IIIA or 13 PERIOD:2nd
BLOCK: p
ELEMENT : CARBON
SYMBOL: C
ATOMIC NUMBER: 6
ATOMIC MASS: 12 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 4 | – | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p2
VALENCY: 4
GROUP: IVA or 14 PERIOD:2nd
BLOCK: p
ELEMENT : NITROGEN
SYMBOL: N
ATOMIC NUMBER: 7
ATOMIC MASS: 14 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 5 | – | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p3
VALENCY: 3 or 5
GROUP: VA or 15 PERIOD:2nd
BLOCK: p
ELEMENT : OXYGEN
SYMBOL: O
ATOMIC NUMBER: 8
ATOMIC MASS: 16 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 6 | – | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p4
VALENCY: 2
GROUP: VIA or 16 PERIOD:2nd
BLOCK: p
ELEMENT : FLUORINE
SYMBOL: F
ATOMIC NUMBER: 9
ATOMIC MASS: 19 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 7 | – | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p5
VALENCY: 1
GROUP: VIIA or 1 PERIOD:2nd
BLOCK: p
ELEMENT : NEON
SYMBOL: Ne
ATOMIC NUMBER: 10
ATOMIC MASS: 20 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | – | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6
VALENCY: 0 (OCTET STATE)
GROUP: VIIIA(0) or 18 PERIOD:2nd
BLOCK: p
ELEMENT : SODIUM
SYMBOL: Na
ATOMIC NUMBER: 11
ATOMIC MASS: 23 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 1 | – |
1s2,2s22p6, 3s1
VALENCY: 1
GROUP: IA(1) PERIOD:3rd
BLOCK: s
ELEMENT : MAGNESIUM
SYMBOL: Mg
ATOMIC NUMBER: 12
ATOMIC MASS: 24 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 2 | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6, 3s2
VALENCY: 2
GROUP: IIA(2) PERIOD:3rd
BLOCK: s
ELEMENT : ALUMINIUM
SYMBOL: Al
ATOMIC NUMBER: 13
ATOMIC MASS: 27 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 3 | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6, 3s23p1
VALENCY: 3
GROUP: IIIA(13) PERIOD:3rd
BLOCK: p
ELEMENT : SILICON
SYMBOL: Si
ATOMIC NUMBER: 14
ATOMIC MASS: 28 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 4 | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6, 3s23p2
VALENCY: 4
GROUP: IVA(14) PERIOD:3rd
BLOCK: p
ELEMENT : PHOSPHORUS
SYMBOL: P
ATOMIC NUMBER: 15
ATOMIC MASS: 30 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 5 | – |
UBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6, 3s23p3
VALENCY: 3 or 5
GROUP: VA(15) PERIOD:3rd
BLOCK: p
ELEMENT : SULPHUR
SYMBOL: S
ATOMIC NUMBER: 16
ATOMIC MASS: 32 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 6 | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6, 3s23p4
VALENCY: 2
GROUP: VIA(16) PERIOD:3rd
BLOCK: p
ELEMENT : CHLORINE
SYMBOL: Cl
ATOMIC NUMBER: 17
ATOMIC MASS: 34 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 7 | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6, 3s23p5
VALENCY: 1
GROUP: VIIA(17) PERIOD:3rd
BLOCK: p
ELEMENT : ARGON
SYMBOL: Ar
ATOMIC NUMBER: 18
ATOMIC MASS: 36 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 8 | – |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6, 3s23p6
VALENCY: 0 (OCTET STATE)
GROUP: VIIIA(0 or 18) PERIOD:3rd
BLOCK: p
ELEMENT : POTASSIUM
SYMBOL: K
ATOMIC NUMBER: 19
ATOMIC MASS: 39 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 8 | 1 |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6, 3s23p6,4s1
VALENCY: 1
GROUP: IA or 1 PERIOD:4th
BLOCK: s
ELEMENT : CALCIUM
SYMBOL: Ca
ATOMIC NUMBER: 20
ATOMIC MASS: 40 amu
ELECTRONIC CONFIGURATION:
SHELL | K | L | M | N |
NO. OF ELECTRONS | 2 | 8 | 8 | 2 |
SUBSHELL ELECTRONIC CONFIGURATION:
1s2,2s22p6, 3s23p6,4s2
VALENCY: 2
GROUP: IIA or 2 PERIOD:4th
BLOCK: s
Compiled by:
Sulaksha Purna Shrestha
GEMS, Dhapakhel
References:
www.alamy.com (for atomic structures)
www.shutterstock.com (for atomic structures)
www.depositphotos.com (for atomic structures)