We offer tutoring programs for students in K-12, AP classes, and college. SchoolTutoring Academy is the premier educational services company for K-12 and college students. If we know atomic number, we get to know the number of electrons also. The atom of an element can be represented as:Ītomic mass = number of protons + number of neutronsĪn atom is neutral due to equal number of electrons in the orbits and protons in the nucleus. For example, mass number of carbon is 12 which mean it has total number of protons and neutrons in the nucleus. The atomic mass (weight), also called as mass number, is the sum of protons and neutrons in the nucleus. Similarly, carbon has 6 protons in its nucleus which implied atomic number of a Carbon atom is 6 For example, atomic number of hydrogen is 1 which means it contains only 1 proton in its nucleus. Each element has a unique atomic number that identifies the number of protons. The atomic number of an atom is the number of protons in its nucleus. If the atomic symbol has two letters, the first letter is capitalized and the second is in lower case. The atoms of all the elements are represented by a unique atomic symbol which is a one or two lettered notation used to represent an atom corresponding to an element. Electrons revolve around positively charged nucleus which is made of protons and neutrons. Electron is negatively charged, proton is positive and neutron is neutral. Each atom is consists of the fundamental particles. An atom is a basic building block of matter around us. The symbol for an atom indicates the element via its usual two-letter symbol, the mass number as a left superscript, the atomic number as a left subscript.
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