Each different element on the periodic table has a different number of protons. The number of protons determines the identity of the element. No two elements have the same number of protons. The atomic number of the element tells us the number of protons.

Question

Isotopes are atoms of the same element with the same number of protons and electrons, but different numbers of neutrons. Isotopes have the same atomic numbers but different mass numbers.

1. Atom B has 34 protons and 40 neutrons. Atom C has 34 protons and 42 neutrons.:

2. Atom E has 10 protons and 11 neutrons. Atom F has 9 protons and 11 neutrons.:

3. Atom 8p, 8n and Atom 9p, 10n

4. Atom 9p, 10n and 9p, 9n

5. Atom U has an atomic number of 5 and a mass number of 12. Atom T has an atomic number of 6 and a mass number of 12.

6. Atom R has an atomic number of 16 and a mass number of 32. Atom S has an atomic number of 16 and a mass number of 33.:

choices: isotopes and different elements

choose the correct answers

Answer 1

Based on your descriptions, we can identify whether the pairs of atoms are isotopes of the same element or different elements:

1. Atom B (34 protons, 40 neutrons) and Atom C (34 protons, 42 neutrons): This pair are isotopes of the same element (Selenium, atomic number 34) since they have the same number of protons but different numbers of neutrons.

2. Atom E (10 protons, 11 neutrons) and Atom F (9 protons, 11 neutrons): This pair represents different elements because they have different atomic numbers (Atom E is Neon with atomic number 10, and Atom F is Fluorine with atomic number 9).

3. Atom with 8 protons (8p, 8n) and Atom with 9 protons (9p, 10n): This pair represents different elements because they have different numbers of protons (Atom with 8 protons is Oxygen, and Atom with 9 protons is Fluorine).

4. Atom with 9 protons (9p, 10n) and Atom with 9 protons (9p, 9n): This pair are isotopes of the same element (Fluorine) since they have the same number of protons and differ in the number of neutrons.

5. Atom U (atomic number 5, mass number 12) and Atom T (atomic number 6, mass number 12): This pair represents different elements (Atom U is Boron, and Atom T is Carbon) because they have different atomic numbers.

6. Atom R (atomic number 16, mass number 32) and Atom S (atomic number 16, mass number 33): This pair are isotopes of the same element (Sulfur) since they have the same number of protons and differ in the number of neutrons.

Here are the answers summarized:

1. Isotopes
2. Different elements
3. Different elements
4. Isotopes
5. Different elements
6. Isotopes