A Quiz On Isotopes and atomic numbers

The atomic number of an element represents the number of protons in the nucleus of its atom. Hydrogen has an atomic number of 1, indicating that it has one proton in its nucleus. This makes hydrogen the simplest and lightest element on the periodic table.

The atomic number of an element represents the number of protons in the nucleus of its atom. In the case of oxygen, the atomic number is 8, which means that an oxygen atom has 8 protons. This number is unique to oxygen and helps to identify it on the periodic table.

Mercury is the correct answer because it is the only metal among the options that is found in a liquid state at room temperature. Zinc, iron, and cadmium are all solid metals at room temperature. Additionally, the given atomic number of 80 corresponds to the element mercury, further confirming the correct answer.

The correct answer is 6 because the atomic number of an element represents the number of protons in the nucleus of its atoms. Carbon has 6 protons, so its atomic number is 6.

The element represented by the letter K has an atomic number of 19. The atomic number of an element corresponds to the number of protons in the nucleus of its atom. In this case, the element with atomic number 19 is potassium (K).

Gold has an atomic number of 79. The atomic number represents the number of protons in the nucleus of an atom. Since gold has 79 protons, its atomic number is 79.

Xenon is a rare gas found in the earth's atmosphere, and its atomic number is 54.

Tritium is the name of the isotope known as hydrogen 3. It is an unstable and radioactive form of hydrogen, containing one proton and two neutrons in its nucleus. Tritium is used in various applications, such as in nuclear weapons, as a tracer in biological and environmental studies, and as a fuel in fusion reactions. It is not protium or deuterium, which are stable isotopes of hydrogen with different numbers of neutrons. Therefore, the correct answer is tritium.

Radium is an element with an atomic number of 88. The atomic number represents the number of protons in the nucleus of an atom, and each element has a unique atomic number. Therefore, the correct answer is 88.

Tin has the most number of stable isotopes compared to the other metals listed. Isotopes are variants of an element that have the same number of protons but different numbers of neutrons. Tin has 10 stable isotopes, which means it has 10 different forms with different neutron numbers that are stable and do not decay over time. In comparison, Silver has only 2 stable isotopes, Magnesium has 3 stable isotopes, and Iron has 4 stable isotopes. Therefore, Tin has the highest number of stable isotopes among the given metals.