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Worksheet: Symbols for Atoms and Ions

Q1:

The neutral atom of an isotope of which noble gas contains 75 neutrons and 54 electrons?

  • ARadon
  • BKrypton
  • CBromine
  • DXenon
  • EIodine

Q2:

Which alkali metal has 11 protons and a mass number of 23?

  • AMagnesium
  • BLithium
  • CPotassium
  • DSodium
  • ECalcium

Q3:

What is the symbol for the ion with atomic number 55, mass number 133 and a 1+ charge?

  • A 1 3 3 5 6 B a
  • B 7 8 5 5 + C s
  • C 1 3 3 5 4 X e
  • D 1 3 3 5 5 + C s
  • E 7 8 5 4 + X e

Q4:

Which isotope is represented by the nuclide symbol 1 9 4 7 7 I r ?

  • AIron-194
  • BIridium-77
  • CIron-77
  • DIridium-194
  • EIron-117

Q5:

The cation of which alkaline earth metal contains 138 neutrons and 86 electrons?

  • ARadon
  • BBarium
  • CFrancium
  • DRadium
  • EThorium

Q6:

What is the symbol for the ion with mass number 31, 18 electrons and a 3 charge?

  • A 1 3 1 8 A r
  • B 3 1 1 8 3 A r
  • C 1 3 1 5 3 P
  • D 3 1 1 5 3 P
  • E 3 1 2 1 S c

Q7:

An ion has the symbol 3 4 2 S .

How many protons does the ion contain?

How many neutrons does the ion contain?

How many electrons does the ion contain?

Q8:

What is the symbol for the ion containing 54 electrons, 53 protons and 74 neutrons?

  • A 5 3 7 4 I
  • B 7 4 5 3 I
  • C 1 2 8 5 4 + X e
  • D 1 2 7 5 3 I
  • E 7 4 5 4 + X e

Q9:

What is the symbol for the ion with a 3+ charge, containing 24 electrons and 30 neutrons?

  • A 5 1 2 1 S c
  • B 5 4 2 4 3 + C r
  • C 5 4 2 7 3 + C o
  • D 5 7 2 7 3 + C o
  • E 2 4 5 4 3 + C r