All isotopes of the same element have the same atomic number, so their proton numbers are equal.
They are on the same (= 'iso') place or spot (= 'topos') in the Periodic Table, this is called: iso-topic .
Elements consist of only one type of atom and cannot be decomposed into simpler substances.
They have identical outer electron structure and also have similar properties
Either one. This is incorrect. The correct answer would be that it is made of separate atoms because iron is an element or a pure substance. So, therefore it didn't combine with anyother atoms to form a molecule and that being said it is strictly made up of separate atoms and not molecules. Definitely not either one.
He said that atoms were indivisible, and we now know is not true because atoms are composed of protons, electrons, and neutrons, and that protons and neutrons are themselves composed of smaller particles. He also said that all of the atoms of the same element have the same mass, which we now know is not true because of the existence of isotopes.
I know it would be DaltonWho discovered that atoms are made of a single material formed into different shapes and sizes? that would be Dalton
Daltons said All elements are made up of atomsAtomos are indivisible and indistructableAtoms of a given element are identical in mass and in all other propertiesA compound is formed when the atoms of two or more elements combine
Unstable atoms are said to be radioactive
An atom is the smallest unit of any element.
An atom is the smallest piece of an element. Said another way, and element is made up one and only one kind of atoms.
Someone Rutherford.
John Dalton
i think Dalton said it
If the atoms of the same element (not only carbon!) occur in different arrangements, they are said to be different allotropes.
The atom is said to be ionized. (It can also be said to be oxidised.)
Radioactive.
The subatomic particle that makes atoms of different elements different from each other is the proton. This is given as the atomic number of the element on the periodic table.
1 mol of Ag and 1 mol of Au can be said to contain the same amount of atoms of each element.
Either one. This is incorrect. The correct answer would be that it is made of separate atoms because iron is an element or a pure substance. So, therefore it didn't combine with anyother atoms to form a molecule and that being said it is strictly made up of separate atoms and not molecules. Definitely not either one.
He said that atoms were indivisible, and we now know is not true because atoms are composed of protons, electrons, and neutrons, and that protons and neutrons are themselves composed of smaller particles. He also said that all of the atoms of the same element have the same mass, which we now know is not true because of the existence of isotopes.