Particle Mass ( g ) Atomic mass units Electrical charge (C) Relative charge elec
ID: 717793 • Letter: P
Question
Particle Mass ( g ) Atomic mass units Electrical charge (C) Relative charge electron 9.109×1028 0.0005486 1.602×1019 1 proton 1.673×1024 1.007276 +1.602×1019 +1 neutron 1.675×1024 1.008665 0 0 The atomic number Z is the number of protons in the nucleus of an atom of an element. Each element has a unique number of protons. For example, an atom with 47 protons is always a silver atom and has an atomic number of 47. The atomic number is used to distinguish different elements from one another. The mass number A is the sum of the number of protons and neutrons in the nucleus of an atom of an element. Atoms that have the same atomic number but different mass numbers are called isotopes. For example, all atoms with atomic number 6 are carbon atoms, but carbon atoms with mass numbers of 12 and 13 are isotopes of one another. Each element is assigned a unique chemical symbol. For example, the symbol for hydrogen is H, and the symbol for oxygen is O. Some elements have symbols based on their names in languages other than English. For example, the symbol for iron is Fe, which is based on the Latin ferrum. The atomic number, mass number, and chemical symbol are often combined to describe a given atom. For example, an atom of lithium (Li) with atomic number 3 and a mass number of 7 could be written 73Li. Since the atomic number and the symbol are both unique to a given element, the atomic number is often left off of this notation, leaving 7Li. Part A Which subatomic particle(s) are found in the nucleus of the atom? Enter the subatomic particle or particles separated by commas.
Explanation / Answer
Part a
An atom is made up of three subatomic particles.
Electron
Proton
Neutron
Electrons are found in the outer shell of the atom and revolves around the nucleus inside an atom.
Protons, neutrons are found inside the nucleus of the atom.
Nucleus + electrons = atom
(protons + neutrons) + electrons = atom