First 20 elements along with neutrons, mass number, electronic configuration
Answers
Answer:
Hydrogen
Atomic Number: 1
Symbol: H
Atomic Mass: 1
Protons: 1
Neutrons: 0
Electrons: 1
Helium
Atomic Number: 2
Symbol: He
Atomic Mass: 4
Protons: 2
Neutrons: 2
Electrons: 2
Lithium
Atomic Number: 3
Symbol: Li
Atomic Mass: 7
Protons: 3
Neutrons: 4
Electrons: 3
Beryllium
Atomic Number: 4
Symbol: Be
Atomic Mass: 9
Protons: 4
Neutrons: 5
Electrons: 4
Boron
Atomic Number: 5
Symbol: B
Atomic Mass: 11
Protons: 5
Neutrons: 6
Electrons: 5
Carbon
Atomic Number: 6
Symbol: C
Atomic Mass: 12
Protons: 6
Neutrons: 6
Electrons: 6
Nitrogen
Atomic Number: 7
Symbol: N
Atomic Mass: 14
Protons: 7
Neutrons:7
Electrons: 7
Oxygen
Atomic Number: 8
Symbol: O
Atomic Mass: 16
Protons: 8
Neutrons: 8
Electrons: 8
Fluorine
Atomic Number: 9
Symbol: F
Atomic Mass: 19
Protons: 9
Neutrons: 10
Electrons: 9
Neon
Atomic Number: 10
Symbol: Ne
Atomic Mass: 20
Protons: 10
Neutrons: 10
Electrons: 10
Sodium
Atomic Number: 11
Symbol: Na
Atomic Mass: 23
Protons: 11
Neutrons: 12
Electrons: 11
Magnesium
Atomic Number: 12
Symbol: Mg
Atomic Mass: 24
Protons: 12
Neutrons: 12
Electrons: 12
Aluminum
Atomic Number: 13
Symbol: Al
Atomic Mass: 27
Protons: 13
Neutrons: 14
Electrons: 13
Silicon
Atomic Number: 14
Symbol: Si
Atomic Mass: 28
Protons: 14
Neutrons: 14
Electrons: 14
Phosphorus
Atomic Number: 15
Symbol: P
Atomic Mass: 31
Protons: 15
Neutrons: 16
Electrons: 15
Sulfur
Atomic Number: 16
Symbol: S
Atomic Mass: 32
Protons: 16
Neutrons: 16
Electrons: 16
Chlorine
Atomic Number: 17
Symbol: Cl
Atomic Mass: 35
Protons: 17
Neutrons: 18
Electrons: 17
Argon
Atomic Number: 18
Symbol: Ar
Atomic Mass: 40
Protons: 18
Neutrons: 22
Electrons: 18
Potassium
Atomic Number: 19
Symbol: K
Atomic Mass: 39
Protons: 19
Neutrons: 20
Electrons: 19
Calcium
Atomic Number: 20
Symbol: Ca
Atomic Mass: 40
Protons: 20
Neutrons: 20
Electrons: 20
Step-by-step explanation:
NB: the superscripts add up to the atomic number of the atom.
Name Atomic Number Electron Configuration
Period 1
Hydrogen 1 1s1
Helium 2 1s2
Period 2
Lithium 3 1s2 2s1
Beryllium 4 1s2 2s2
Boron 5 1s2 2s22p1
Carbon 6 1s2 2s22p2
Nitrogen 7 1s2 2s22p3
Oxygen 8 1s2 2s22p4
Fluorine 9 1s2 2s22p5
Neon 10 1s2 2s22p6
Period 3
Sodium 11 1s2 2s22p63s1 Magnesium 12 1s2 2s22p63s2
Aluminum 13 1s2 2s22p63s23p1
Silicon 14 1s2 2s22p63s23p2
Phosphorus 15 1s2 2s22p63s23p3
Sulfur 16 1s2 2s22p63s23p4
Chlorine 17 1s2 2s22p63s23p5
Argon 18 1s2 2s22p63s23p6
Period 4
Potassium 19 1s2 2s22p63s23p64s1
Calcium 20 1s2 2s22p63s23p64s2