neutral, with the number of protons equaling the number of electrons.
All atoms in the beginning were hydrogen atoms.
Every element has its own kind of atom, identifiable from atoms of another element by its number of protons.
In any element, all atoms are identical in terms of their number of protons in the nucleus, which determines the element's identity. However, atoms of the same element can differ in the number of neutrons, resulting in isotopes.
Dalton believed that there was a different atom for each element that there was, and that these atoms made up the elements that were in existence. He did not say exactly how these atoms were different, just that they were different. Dalton also believed that all of the atoms for a given element were exactly alike in every way.
Each element has a unique number of protons in the nucleus of their atoms.
Every elements are all made from atoms, which are very very very small, and everything else is made of atoms.
All atoms of the same element are not identical. The atoms of same element with different number of neutrons are called as isotopes. Although, the number of protons and electrons are same in every atom.
All substances are made up of atoms. Atoms are the basic building blocks of matter and are composed of protons, neutrons, and electrons. These atoms combine to form molecules, which make up different substances.
Dalton's atomic theory states that elements are composed of indivisible atoms and that all atoms of a given element are identical in mass and properties. Atoms of different elements have different masses and properties.
same number of each element
All the atoms have the same number of protons (element type).
Each element has a different number of electrons. All atoms of that element have the same number of electrons. The number of electrons is the same as the number of protons.
A single type of atoms.
The number of protons is identical in all atoms of an element.
A substance in which all atoms are identical is called an element.
When all atoms in a substance are alike, the substance is an element. Each element is composed of atoms that have the same number of protons in their nucleus.
All atoms in the beginning were hydrogen atoms.