what determines an atoms Identity?
The number of neutrons
The number of protons
The valence number
The number of electrons
5 answers
The number of protons determines an atom's identity. It is known as the atomic number, and it determines the element that the atom belongs to. The number of neutrons can vary for atoms of the same element, forming isotopes, but it does not affect the atom's identity. The valence number determines the chemical properties and reactivity of an atom but does not define its identity. The number of electrons in a neutral atom is equal to the number of protons and helps determine the atom's behavior during chemical reactions, but it also does not determine its identity.
what can be stated for a particular element if only the group number of 14 is known?
the element has 4 electrons
the element has 14 neutrons
the element has 14 protons
the element has 4 valence electrons
the element has 4 electrons
the element has 14 neutrons
the element has 14 protons
the element has 4 valence electrons
If only the group number of 14 is known, it can be stated that the element has 4 valence electrons. The group number refers to the number of valence electrons in the outermost shell of an atom. For group 14 elements, such as carbon (C) and silicon (Si), they have 4 valence electrons. However, the number of electrons, protons, and neutrons cannot be determined solely based on the group number.
why are noble gases the least reactive elements?
Noble gases are the least reactive elements because they have a stable electronic configuration. The noble gases, which include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn), have full valence electron shells. These elements have a completely filled outermost shell with 8 electrons (except for helium, which has 2 electrons).
Having a full valence shell makes noble gases highly stable and less likely to form chemical bonds with other elements. They do not easily gain, lose, or share electrons with other atoms since their electronic configuration is already very stable. This stability is due to the fact that they possess a full complement of electrons in their outermost energy level. As a result, noble gases generally do not react with other elements, and hence, they are considered to be the least reactive elements.
Having a full valence shell makes noble gases highly stable and less likely to form chemical bonds with other elements. They do not easily gain, lose, or share electrons with other atoms since their electronic configuration is already very stable. This stability is due to the fact that they possess a full complement of electrons in their outermost energy level. As a result, noble gases generally do not react with other elements, and hence, they are considered to be the least reactive elements.
1 answer