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An atom of helium-4 differs from an atom of lithium-7 in that the atom of helium-4 has
+7
Cl, K, Ar
subtracting the atomic number from the mass number
20
the total number of protons and the total number of electrons in the atom
number of protons is equal to the number of electrons
two less neutrons
6
In which list are the elements arranged in order of increasing atomic mass?
+7
Cl, K, Ar
subtracting the atomic number from the mass number
20
the total number of protons and the total number of electrons in the atom
number of protons is equal to the number of electrons
two less neutrons
6
The number of neutrons in the nucleus of an atom can be determined by
+7
Cl, K, Ar
subtracting the atomic number from the mass number
20
the total number of protons and the total number of electrons in the atom
number of protons is equal to the number of electrons
two less neutrons
6
What can be known if only the atomic number of an atom is known?
+7
Cl, K, Ar
subtracting the atomic number from the mass number
20
the total number of protons and the total number of electrons in the atom
number of protons is equal to the number of electrons
two less neutrons
6
What is the total charge of the nucleus of a nitrogen atom
+7
Cl, K, Ar
subtracting the atomic number from the mass number
20
the total number of protons and the total number of electrons in the atom
number of protons is equal to the number of electrons
two less neutrons
6
What is the atomic number of an element that has 6 protons and 8 neutrons?
+7
Cl, K, Ar
subtracting the atomic number from the mass number
20
the total number of protons and the total number of electrons in the atom
number of protons is equal to the number of electrons
two less neutrons
6
What is the total number of neutrons in the nucleus of a neutral atom that has 19 electrons and a mass number of 39?
+7
Cl, K, Ar
subtracting the atomic number from the mass number
20
the total number of protons and the total number of electrons in the atom
number of protons is equal to the number of electrons
two less neutrons
6
An atom is electrically neutral because the
+7
Cl, K, Ar
subtracting the atomic number from the mass number
20
the total number of protons and the total number of electrons in the atom
number of protons is equal to the number of electrons
two less neutrons
6
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