W RITE THE SHORTHAND NOTATION ( SYMBOL ), SHOWING BOTH THE MASS NUMBER AND THE A
ID: 275736 • Letter: W
Question
WRITE THE SHORTHAND NOTATION (SYMBOL), SHOWING BOTH THE MASS NUMBER AND THE ATOMIC NUMBER.
chlorine 5. phosphorus
strontium 6. zinc
neon 7. silicon
beryllium 8. calcium
DETERMINE THE NUMBER OF PROTONS, NEUTRONS, AND ELECTRONS.
9. carbon - 12
14. fluorine - 19
10.
cadmium - 112 15.
16. sodium - 23
oxygen - 16
Name: _______________________________________________Date: _____________________
CALCULATE THE MASS NUMBER AND DETERMINE THE ELEMENT.
17. atomic number = 5 18. electrons = 52
neutrons = 6 neutrons = 76
CALCULATE THE NUMBER OF PROTONS AND ELECTRONS, AND DETERMINE THE ELEMENT.
19. neutrons = 22 20. neutrons = 78 mass number = 40 mass number = 133
IF YOU KNOW ONLY THE FOLLOWING INFORMATION, CAN YOU ALWAYS DETERMINE WHAT THE ELEMENT IS, YES OR NO?
number of protons _______
number of neutrons _______
number of electrons of a neutral atom _______
Explanation / Answer
Shorthand notation for
Chlorine is Cl and its atomic number is 17 amd mass mass number is 34.45
Phosphorus is P and atomic number is 15 and mass mumber is 31
Strontium is Sr ,atomic number is 38 and mass number is 89
Zinc is Zn and atomic number is 30 and mass number is 65
Neon atomic number is 10 and mass number is 20 and symbol is Ne
Silicon, symbol is Si and atomic number is 14 and mass number is 28.
Berylium ,the symbol is Be and atomic number is 4 and mass number is 9
Calcium ,the symbol is Ca and atomic number is 20 and mass number is 40
Calculate number of protons neutrons and electrons
9. Carbon-12
E-6
P-6
Neutrons-6
14. Fluorine-19
E-9
P-9
Neutrons-10
10. Cadmium-112
E-48
P-48
N-64
15. Sodium 23
E-11
P11
N-12
Oxygen-16
E-8
P-8
N-8
Calculate the mass number and identify element
Atomic number 5 and neutron 6
Element is boron and its mass number is 11
Electrons 52 and neutrons 76
Element is telurium and mass number is 128
Calcuate the number of protons and electrons and determine the element
19. Neutrons 22 and mass number 40 ,so number of protons will be 18 and the electrons will also be 18 and the element is argon
20 neutrons 78 and mass number 133 so the number of protons will be 133-78=55 and electrons will also be 55 and the element is cesium
If u know only protons ,then yes ypu can kdentify what the element is as number .of protons and electorns are equal in an neutral atom
If u know only neutrons then NO
If u know number of electrons i an neutral atom then Yes it will be its atomic number.
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