Question

1. What is an atom? What atoms are made of? 2. What is an element? How many elements are there? 3. What is the difference between atoms and elements? 4. How many electrons fit in each shell around an atom? 5. Why do protons and neutrons stay together in the nucleus?

Answer 1

Answer:

Q1 An atom is the smallest unit of ordinary matter that forms a chemical element.

Q2They're typically made up of three main parts: protons, neutrons and electrons.

Q3In chemistry, an element is a pure substance which cannot be broken down by chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei.

Q4Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.

Q5The nucleus of an atom is held together by the strong nuclear force that binds together protons and neutrons. Although the strong nuclear force is the strongest of the four fundamental forces, it acts only over very short - typically nuclear - distances. It binds together the protons and neutrons in the nucleus.

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Answer 2

ANSWER ♥️

1. ATOMS are the tiny and basic unit of any structure or element. Atom is made up of protons,neutrons and electrons.
2. ELEMENTS are the pure substances. There are 118 element.
3. A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing just one proton and one electron.
4. Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.
5. The nucleus of an atom is held together by the strong nuclear force that binds together protons and neutrons. Although the strong nuclear force is the strongest of the four fundamental forces, it acts only over very short - typically nuclear - distances. It binds together the protons and neutrons in the nucleus.

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