Question

B. Choose the correct options and fill in the blanks.
1. Isotopes have a different number of ........
(protons/neutrons).
2. An
(ionic/covalent) bond is formed by the transfer of electrons.
3. The isotopes of an element occupy the
(same/different) position(s) in the
periodic table.
4. The mass of a proton is equal to a
(hydrogen/helium) atom.
5. In Bohr's atomic model, shells are also called .....
(planets/orbitals).​

Answer 1

Answer:

Mark Brainliest!!!!!

Explanation:

1)protons

2)ionic

3)different

4)hydrogen

5)orbitals

Answer 2

Answer:

hope it helps u dear

Explanation:

An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.

Ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Such a bond forms when the valence (outermost) electrons of one atom are transferred permanently to another atom.

All isotopes of an element have same number of protons and hence they have the same atomic number. Hence, they can be placed at the same position in the periodic table.

According to the Bohr model, often referred to as a planetary model, the electrons encircle the nucleus of the atom in specific allowable paths called orbits. When the electron is in one of these orbits, its energy is fixed.

For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons. For most of the 16 lightest elements (up to oxygen) the number of neutrons is equal to the number of protons.