Question

Give the name and symbol for the element with this number of protons.

11

17

79

Give the number of protons, neutrons, and electrons in each of these neutral atoms.

nitrogen-15 ()

sulfur-35 ()

bromine-82 ()

radium-226 ()

Using the periodic table as a guide, specify the number of protons and electrons in a neutral atom of each of these elements.

carbon (C)

nitrogen (N)

magnesium (Mg)

Answer 1

Give the name and symbol for the element with this number of protons.

11        Sodium Na

17        Chlorine Cl

79        Gold Au

Give the number of protons, neutrons, and electrons in each of these neutral atoms.

nitrogen-15 ()
Atomic number 7, mass number 15
number of protons    7
number of neutrons    15 - 7 = 8
number of electrons    7

sulfur-35 ()
Atomic number 16, mass number 35
number of protons    16
number of neutrons    35-16 = 19
number of electrons    16

bromine-82 ()
Atomic number 35, mass number 82
number of protons    35
number of neutrons    82-35 = 47
number of electrons    35

radium-226 ()
Atomic number 88, mass number 226
number of protons    88
number of neutrons    226-88 = 138
number of electrons    88

Using the periodic table as a guide, specify the number of protons and electrons in a neutral atom of each of these elements.

carbon (C)
Atomic number 6
Number of protons 6
Number of electrons 6

nitrogen (N)
Atomic number 7
Number of protons    7
Number of electrons    7

magnesium (Mg)
Atomic number 12
Number of protons    12
Number of electrons    12