More specifically, atoms that have the same number of protons in their nucleus belong to the same chemical element. The number of protons an atom has in its nucleus is given by the atomic number. An atom’s mass number tells you the number of protons and neutrons that atom has in its nucleus.
When two atoms have the same number they are classified as the same?
Two atoms with the same atomic number, but different mass numbers (same number of protons, different number of neutrons), are called isotopes, or isotopic nuclides. Having different numbers of neutrons changes the mass of these atoms, so isotopes have slight variations in their physical and chemical behavior.
When atoms have the same atomic number?
Isotopes are atoms that have the same atomic number (and are therefore of the same element) but different mass numbers.
What does atoms have the same number of?
Atoms do not always contain the same number of electrons and protons, although this state is common. 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).
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. Otherwise, all atoms with the same atomic number have the same atomic mass.
Can two elements have the same atomic number?
No, because each element has its own specific property, BUT certain elements have similar properties, like elements in the same family. The atomic number is associated to the element’s composition for one atom, in which the atomic number = number of protons in the atom with a neutral charge.
What statement is true of atoms?
The statement that is TRUE about atoms is “electrons determine the size of the atom.” The electrons surround the nucleus of an atom and they determine the space in which an atom occupies.
Who said an atom is mostly empty space?
In 1911, a British scientist named Ernest Rutherford discovered that an atom is mostly empty space. He concluded that the positively charged particles are contained in a small central core called the nucleus.
Which two has the same mass number?
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).
Are atoms that carry an electric charge?
The protons and electrons of an atom are attracted to each other. They both carry an electrical charge. Protons have a positive charge (+) and electrons have a negative charge (-). The positive charge of the protons is equal to the negative charge of the electrons.
What difference will it make if two identical elements have different number of neutrons?
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 between the various isotopes of an element means that the various isotopes have different masses.
Do all atoms have the same number of neutrons?
Neutrons are all identical to each other, just as protons are. Atoms of a particular element must have the same number of protons but can have different numbers of neutrons.
Can two elements have same mass?
Answer: 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).
Is an atom a positive charge?
An atom consists of a positively charged nucleus, surrounded by one or more negatively charged particles called electrons. The positive charges equal the negative charges, so the atom has no overall charge; it is electrically neutral. The nucleus of an atom contains protons and neutrons. …
Who discovered Proton *?
-The discovery of the proton is credited to Ernest Rutherford, who proved that the nucleus of the hydrogen atom (a proton) is present in the nuclei of all other atoms in the year 1917.
Do all elements have a different atomic number?
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.