Table of Contents
- 1 What is an atom definition in chemistry?
- 2 What is an atom in answer?
- 3 What is an atom in chemistry GCSE?
- 4 What is an atom Class 10?
- 5 What is an atom ks2?
- 6 What is an atom made of BBC Bitesize?
- 7 What elements are in an atom?
- 8 What does an atom mostly contain?
- 9 What is the chemical formula for an atom?
What is an atom definition in chemistry?
An atom is a particle of matter that uniquely defines achemical element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The number of protons in the nucleus ofan atom is the atomic number for the chemical element.
What is an atom in answer?
An atom is the smallest component of an element and the building blocks of all matter, characterized by sharing of the chemical properties of the element and a nucleus with neutrons, protons, and electrons.
What is an atom in chemistry GCSE?
An atom is the smallest part of an element that can exist. Atoms of each element are represented by their own chemical symbol.
What is an atom in chemistry class 9?
The smallest tiny particles of matter which can’t be divided further is called atom, i.e., an atom is the smallest building block of matter. For example: Sodium (Na), Hydrogen (H), Oxygen (O), etc.
Why is atom called atom?
The term “atom” comes from the Greek word for indivisible, because it was once thought that atoms were the smallest things in the universe and could not be divided.
What is an atom Class 10?
Atoms are the fundamental building block of a matter that retains its all chemical properties. As we can see, most of the mass of an atom is concentrated in its nucleus. The mass of an electron is only 1/1836 the mass of the nucleus of the lightest atom, that of hydrogen.
What is an atom ks2?
The atom is the basic building block for all matter in the universe. Atoms are extremely small and are made up of a few even smaller particles. The basic particles that make up an atom are electrons, protons, and neutrons. They can change and undergo chemical reactions, sharing electrons with other atoms.
What is an atom made of BBC Bitesize?
Since the nucleus contains protons and neutrons, most of the mass of an atom is concentrated in its nucleus. Protons and electrons have electrical charges that are equal and opposite….Subatomic particles.
| Subatomic particle | Relative mass | Relative charge |
|---|---|---|
| Electron | Very small | -1 |
What is an atom for Class 8?
An atom is defined as the structural and functional unit of a matter. The term “atom” comes from the Greek word which means indivisible, because atoms are the smallest things in the universe and could not be divided. atoms are made up of three subatomic particles like protons, neutrons and electrons.
What determines chemical activity of an atom?
Chemical activity of an atom. These valence electrons have the ability to participate in a chemical reactions. And the atom with 8 electrons in its valence shell is stable. to attain the stability the atom participate in chemical reactions by gaining electron, by loosing electrons or by sharing the electrons.
What elements are in an atom?
Hydrogen:[1.00784,1.00811]
What does an atom mostly contain?
An atom is made up of three major sub-atomic particles namely protons, electrons and neutrons. The electrons form a cloud around the nucleus and are bound to the nucleus by electromagnetic forces. At the center of an atom is a nucleus that contains the protons and the neutrons, collectively called the nucleons.
What is the chemical formula for an atom?
A molecule is a group of atoms that joined together by one or more covalent bonds. The above image represents a water molecule. The chemical formula for water is H2O. There are two hydrogen atoms that are joined to one oxygen atom.