science notes

What is a isotope

• An isotope is a variant of a chemical element with the same number of protons but different numbers of neutrons.
• An isotope is a type of molecule with varying chemical properties.
• An isotope is an element that has a different number of protons than neutrons.
• An isotope is a stable form of a chemical compound.

Which of the following statements is true about isotopes?

• Isotopes have the same atomic number but different atomic masses.

• Isotopes have different atomic numbers and the same atomic masses.

• Isotopes are elements with the same number of neutrons but different numbers of protons.

• Isotopes are molecules with identical chemical properties.

How do isotopes of an element differ from each other?

• They have different numbers of electrons.

• They have different numbers of neutrons.

• They have different numbers of protons.

• They have different chemical properties.

what is reactivity

• Reactivity is the ability of a substance to remain inert.
• Reactivity is the ability of a substance to engage in chemical reactions.
• Reactivity is the measure of a substance's temperature.
• Reactivity refers to the physical state of a substance.

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Changing the number of neutrons in an atom results in the formation of a(an) _______

• atom
• isotope
• anion ( a negative ion)
• cation (a positive ion)

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

what is conductivity

• Conductivity is the measure of a material's ability to conduct electric current or heat.
• Conductivity refers to the color of a material.
• Conductivity is the ability of a material to insulate heat.
• Conductivity is the measure of a material's density.

what is a noble gas

• Noble gases are essential for human respiration.
• Noble gases are found only in liquid form.
• Noble gases are highly reactive elements.
• Noble gases are inert gases that do not readily react with other elements.

whats a neutron

• A neutron is a neutral subatomic particle found in the nucleus of an atom.
• A neutron is a positively charged particle in an atom.
• A neutron is a type of electron found outside the nucleus.
• A neutron is a particle that orbits the nucleus of an atom.