– Atoms of
a given element are identical
(meaning they have the same mass and properties). – Atoms retain their identity in all chemical reactions. This is basically the Law of Conservation of matter stating that an equal amount of mass exists before and after a reaction.
What number is exactly the same for atoms of the same element?
Neutral atoms of an element contain
an equal number of protons and electrons
. The number of protons determines an element’s atomic number (Z) and distinguishes one element from another. For example, carbon’s atomic number (Z) is 6 because it has 6 protons.
Are all atoms of the same element exactly the same?
No.
Two atoms of the same chemical element are typically not identical
. … Since the states of the electrons in an atom are what determine the nature of the chemical bonding that the atom experiences, two atoms of the same element can react differently if they are in different states.
Can two atoms have the same atomic mass?
Assuming you just mean the mass of the atom, it means that they have a different number of neutrons
How can 2 atoms have the same atomic mass?
Two atoms with the same atomic number, but different mass numbers (same number of protons, different number of neutrons
Can two elements have same mass?
Atoms of the same chemical element do not always have the same mass
because, although the number of protons in the nucleus is the same for all atoms of the same element, the number of neutrons is not. Most elements as they occur naturally on earth are mixtures of several isotopes.
Which gas is highest in universe?
Hydrogen
, most abundant in the universe, is the chemical element with atomic number 1, and an atomic mass of 1.00794 amu, the lightest of all known elements. It exists as a diatomic gas (H2). Hydrogen is the most abundant gas in the universe.
What is it called when two atoms have the same atomic number?
Isotopes
are atoms with different atomic masses which have the same atomic number. The atoms of different isotopes are atoms of the same chemical element; they differ in the number of neutrons in the nucleus.
Which two has the same mass number?
Atoms of an element with the same mass number make up
an isotope of the element
. Different isotopes of the same element cannot have the same mass number, but isotopes of different elements often do have the same mass number, e.g., carbon-14 (6 protons and 8 neutrons) and nitrogen-14 (7 protons and 7 neutrons).
What makes each element unique?
Each element has its own unique properties.
Each contains a different number of protons and neutrons
, giving it its own atomic number and mass number. The atomic number of an element is equal to the number of protons that element contains.
Which tells that an atom is neutral?
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons).
The total electric charge of the atom is
therefore zero and the atom is said to be neutral.
Does an atom has no mass?
Even if we ignore every kind of field and particle except electrons, protons and neutrons, we find that
atoms are still not empty
. … It’s true that a large percentage of the atom’s mass is concentrated in its tiny nucleus, but that does not imply that the rest of the atom is empty.
What do all atoms of any single element have in common?
The common feature is that the atoms of all elements consist of
electrons, protons, and neutrons
.
Why do different elements have different masses?
Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons.
The difference in the number of neutrons
What is the rarest element in the universe?
Astatine
Which element found highest amount in universe?
Hydrogen
is the most abundant element in the Universe; helium is second.
