Isotopes

Which of the following do isotopes of an element have similar in number?

• nucleus

• protons

• neutrons

• atomic mass

Answer explanation

Isotopes are atoms of the same element that have the same number of protons but different atomic mass.

What do you call two elements with the same atomic number but a different mass number?

• Isobars

• Isosceles

• Isotopes

• Isometric

Answer explanation

Isotopes are two atoms of the same elementwith the same atomic number but a different mass number.

Which of the following is not an isotope of hydrogen?

• Hydrogen-1

• Hydrogen-2

• Hydrogen-3

• Hydrogen-4

Answer explanation

Hydrogen has only 3 isotopes namely: Hydrogen-1, Hydrogen-2, and Hydrogen-3.

Which of the following does not have an isotope?

• Oxygen

• Carbon

• Fluorine

• Hydrogen

Answer explanation

Some elements that do not have isotopes are Beryllium (Be), Fluorine (F), and Sodium (Na).

Which of the following have an isotope?

• Beryllium

• Fluorine

• Chlorine

• Sodium

Which of the following is true regarding isotopes?

• Isotopes have the same atomic mass.

• Isotopes have the same number of protons.

• Isotopes have the same number of protons and neutrons.

• Isotopes have different chemical properties.

What do you call isotopes which can emit high-energy radiation?

• Radioisotopes

• Radio waves

• Gamma Waves

• Ultraviolet

Tags

NGSS.HS-PS1-8

Which of the following is used in smoke detectors?

• Iodine-131

• Uranium-238

• Americium-241

• Technecium-99

Which of the following is used in the detection of tumors?

• Iodine-131

• Uranium-238

• Carbon-14

• Technetium-99

Which of the following is used in determining the age of rocks?

• Carbon-14

• Iodine-131

• Uranium-238

• Americium-241

Tags

NGSS.HS-ESS1-5