The number of electrons are always equal to the number of protons to keep the atom's charge neutral (unless your dealing with ions). And the number of protons in an atom are it's atomic number. So essentially, the number of electrons is the atomic number.
The Atomic Number of the element is equal to the number of electrons. Also, the number of protons is also equal to the Atomic number; so the number of protons and electrons in any given element is the same!
The atomic number of an element is the number of protons in the nuclei of its atoms, and the elements are arranged according to their atomic numbers from 1 to 118. A neutral atom has the same number of electrons as protons.
To find the number of protons (atomic number), you can use the number of electrons, in this case 12 electrons. Since atoms are electrically neutral, the number of protons is equal to the number of electrons, which is 12. To find the mass number, you add the number of protons and neutrons together. In this case, you have 12 protons and 10 neutrons, so the mass number would be 22.
atomic number = number of protons = number of electrons atomic mass = mass of protons + mass of neutrons
The numbers of protons and of electrons in an atom are both the same as the atomic number, and the difference between the mass number and the atomic number is the number of neutrons in the atom.
To find the number of electrons in a chlorine atom, you look at its atomic number on the Periodic Table. Chlorine has an atomic number of 17, which means it has 17 electrons since the number of electrons in an atom is equal to its atomic number.
valence electrons is the same as the number as the last digit in the group :)
The atomic number of an element tells you how many electrons there are and how many protons there are.
The Atomic Number of the element is equal to the number of electrons. Also, the number of protons is also equal to the Atomic number; so the number of protons and electrons in any given element is the same!
The atomic number of an element is the number of protons in the nuclei of its atoms, and the elements are arranged according to their atomic numbers from 1 to 118. A neutral atom has the same number of electrons as protons.
number of protons and electrons present in an element is equal to the atomic number of that element while number of neutrons is equal to mass number - atomic number/number of protons/number of electrons.
To find the number of protons (atomic number), you can use the number of electrons, in this case 12 electrons. Since atoms are electrically neutral, the number of protons is equal to the number of electrons, which is 12. To find the mass number, you add the number of protons and neutrons together. In this case, you have 12 protons and 10 neutrons, so the mass number would be 22.
Use the Periodic Table to get Atomic number (19), and atomic mass (39.1). The atomic number is the number of protons, and in the neutral atom, also the number of electrons: 19. The atomic mass is the sum of the mass of the protons and neutrons, 39.1. Subtract the number of protons (use integers) from the atomic mass, 39 - 19 = 20, which is the number of neutrons. Protons = 19 Neutrons = 20 Electrons = 19
atomic number = number of protons = number of electrons atomic mass = mass of protons + mass of neutrons
The numbers of protons and of electrons in an atom are both the same as the atomic number, and the difference between the mass number and the atomic number is the number of neutrons in the atom.
To find the number of protons in a molecule, you sum the atomic numbers for each element present in the molecule. Each proton has a positive charge equal to its atomic number. For neutral molecules, the number of protons also equals the number of electrons, as atoms are electrically neutral with equal numbers of protons and electrons.
To find the number of protons, you use the atomic number. The atomic number is always the same number of protons. To find the average number of neutrons, you use the atomic mass and take away the number of protons. For example Oxygen has an atomic number of 8 and an atomic mass of 16.01, so since it has an atomic number of 8, it always has 8 protons, and since oxygen has a mass of 16.01, it has an average of 8.01 neutrons (the math: 16.01 mass-8 protons=8.01 neutrons). If your dealing with isotopes, you round the mass number. The mainest isotope is 8 neutrons in oxygen, but there is a few oxygen atoms that have 9 neutrons which is why the average mass is little higher than 16.