you know that two atoms are the same element if they have the same atomic number,
aka number of protons in the nucleus.
Two atoms of the same element and mass number.
The masses of any two atoms of the same element are not always the same. Atomic mass (the mass you see on the periodic table) is just a weighted average of all of the weights of all of the different isotopes of an element.
Covalent. There is no electronegativity difference between two atoms of the same element.
when you have two different forms of an atom with different masses, it's called an isotope of the atom.
Iodine, I2 is an diatomic element, with two atoms in the molecule.
The number of protons.
They would have to be atoms of the same element, and the same isotope of that element.
Yes. If two atoms have the same number of protons then by definition they are the same element.
A nonpolar covalent bond between two atoms of the same element occurs when they have the same electronegativity, leading to equal sharing of electrons. This results in a symmetrical distribution of charge, making the bond nonpolar.
Not necessarily. The atomic radius of an element is determined by the size of the atom's electron cloud. While atoms of the same element would typically have the same atomic radius, atoms of different elements can vary in size due to differences in their electron configurations and the number of protons in their nuclei.
The number of protons in the nucleus is the same for both isotopes since they are of the same element. Isotopes of the same element have the same number of protons (which determines the element) but a different number of neutrons, leading to a difference in atomic mass.
Yes. The number of protons defines the element.
The oxygen molecule is made of two atoms of oxygen bonded together (O2).
molecule.
Diatomic
yes
The number of Neutrons -Apex