Write the nuclear compositions of F 9 19 .

The nucleus of an atom is made up of positively charged protons and electrically neutral neutrons. The fluorine atom has atomic number 9 and mass number 19. The atomic number is the number of protons present in the nucleus of an atom of that element; therefore, fluorine has 9 protons in its nucleus. The sum of the numbers of protons and neutrons in an atom is called the mass number. Mass number = Atomic number + Number of neutrons Number of neutrons = Mass number - Atomic number Number of neutrons = 19 - 9 = 10 Hence, the nuclear composition of F 9 19 is 9 protons and 10 neutrons.

Write the nuclear compositions of Ar 18 40 .

The nucleus of an atom is made up of positively charged protons and electrically neutral neutrons. The argon atom has atomic number 18 and mass number 40. The atomic number is the number of protons present in the nucleus of an atom of that element; therefore, argon has 18 protons in its nucleus. The sum of the numbers of protons and neutrons in an atom is called the mass number. Mass number = Atomic number + Number of neutrons Number of neutrons = Mass number - Atomic number Number of neutrons = 40 - 18 = 22 Hence, the nuclear composition of Ar 18 40 is 18 protons and 22 neutrons.

Write the nuclear compositions of each K 19 39 .

The nucleus of an atom is made up of positively charged protons and electrically neutral neutrons. The potassium atom has atomic number 19 and mass number 39. The atomic number is the number of protons present in the nucleus of an atom of that element; therefore, potassium has 19 protons in its nucleus. The sum of the numbers of protons and neutrons in an atom is called the mass number. Mass number = Atomic number + Number of neutrons Number of neutrons = Mass number - Atomic number Number of neutrons = 39 - 19 = 20 Hence, the nuclear composition of K 19 39 is 19 protons and 20 neutrons.

Write the nuclear compositions of Ca 20 40 .

The nucleus of an atom is made up of positively charged protons and electrically neutral neutrons. The calcium atom has atomic number 20 and mass number 40. The atomic number is the number of protons present in the nucleus of an atom of that element; therefore, calcium has 20 protons in its nucleus. The sum of the numbers of protons and neutrons in an atom is called the mass number. Mass number = Atomic number + Number of neutrons Number of neutrons = Mass number - Atomic number Number of neutrons = 40 - 20 = 20 Hence, the nuclear composition of Ca 20 40 is 20 protons and 20 neutrons.

Write the nuclear compositions of each Br 35 80 .

The nucleus of an atom is made up of positively charged protons and electrically neutral neutrons. The bromine atom has atomic number 35 and mass number 80. The atomic number is the number of protons present in the nucleus of an atom of that element; therefore, bromine has 35 protons in its nucleus. The sum of the numbers of protons and neutrons in an atom is called the mass number. Mass number = Atomic number + Number of neutrons Number of neutrons = Mass number - Atomic number Number of neutrons = 80 - 35 = 45 Hence, the nuclear composition of Br 35 80 is 35 protons and 45 neutrons.

Write the nuclear compositions of each Kr 36 84 .

The nucleus of an atom is made up of positively charged protons and electrically neutral neutrons. The krypton atom has atomic number 36 and mass number 84. The atomic number is the number of protons present in the nucleus of an atom of that element; therefore, krypton has 36 protons in its nucleus. The sum of the numbers of protons and neutrons in an atom is called the mass number. Mass number = Atomic number + Number of neutrons Number of neutrons = Mass number - Atomic number Number of neutrons = 84 - 36 = 48 Hence, the nuclear composition of Kr 36 84 is 36 protons and 48 neutrons.