Is it true that no two elements have the same atomic number?

The atomic number gives the “identity” of an element as well as its location on the periodic table. No two different elements will have the same atomic number. The atomic mass of an element is the total number of protons and neutrons in the nucleus of the atom.

Why does elements have different atomic number?

The number of protons in an atom is called its atomic number. This number is very important because it is unique for atoms of a given element. All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms. In the case of helium, the atomic number is 2.

Do elements always have the same atomic number?

Each element has its own characteristic atomic number. Atoms of the same element always have the same number of protons, same Z, but often have different numbers of neutrons, therefore, different mass numbers. These atoms are called isotopes and are introduced in next section.

Can two elements have the same atom?

No. Two atoms of the same chemical element are typically not identical. First of all, there is a range of possible states that the electrons of an atom can occupy. Two atoms of the same element can be different if their electrons are in different states.

Why atoms of two different elements can have the same mass number but Cannot have the same atomic number?

All atoms of a chemical element have the same atomic number (number of protons in the nucleus) but may have different mass numbers (from having different numbers of neutrons in the nucleus). Atoms of an element with the same mass number make up an isotope of the element.

Why do all atoms of the same element have the same number of protons?

Atoms are neutral in electrical charge because they have the same number of negative electrons as positive protons (Table 2.4. 1). Therefore, the atomic number of an atom also tells you how many electrons the atom has….Atomic Number.

Can two different elements have the same atomic number quizlet?

Two different elements can have the same atomic number. The sum of the protons and neutrons in the nucleus of that atom. Atoms of the same element that have different mass numbers.

When two atoms have the same atomic number they have the same number of?

Isotopes of any given element all contain the same number of protons, so they have the same atomic number (for example, the atomic number of helium is always 2). Isotopes of a given element contain different numbers of neutrons, therefore, different isotopes have different mass numbers.

Can atoms of two different elements to have the same number of electrons?

Chemical properties In any neutral atom, the number of electrons is the same as the number of protons. As a result, isotopes of the same element also have the same number of electrons and the same electronic structure.

Do atoms of the same element have the same number of protons?

All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms. Atoms are neutral in electrical charge because they have the same number of negative electrons as positive protons (Table 2.4. 1).

Can two atoms of the same element can have different numbers of protons?

If two atoms have different numbers of protons, they are different elements. 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.