Atomic Structure and Electrons

Among ions and isotopes, which subatomic particle remains the same?

• the number of protons

• the number of electrons

• the number of neutrons

• the mass number

Which statement about electrons is true?

• electrons attract one another

• electrons are repelled by protons

• electrons have the same magnitude as protons but are opposite in charge

• electrons weigh the same as neutrons

Which of the following exhibits both properties of metals and non metals?

• Mg

• Zn

• Si

• Ne

Which element has similar chemical properties as Oxygen?

• Sulfur

• Neon

• Berryllium

• Phosphorus

How many neutrons are in the krypton atom above?

• 84

• 36

• 48

• 120

Which correctly describes the ion?

• P= 17, E= 17, N= 19

• P= 36, E= 17, N= 19

• P= 17, E= 18, N= 19

• P= 17, E= 18, N= 18

What is the correct electronic configuration of iron?

• 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁶

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d10 4s²

• 1s² 2s² 2p⁶ 3s² 3p⁶ 3d⁶

• 1s² 2p⁶ 3p⁶ 3d⁶

Which of the following elements has the highest ionization energy?

• Sulfur

• Magnesium

• Silver

• Iodine

What is the identity of the element with the following noble gas configuration [Kr] 5s² 4d¹⁰ 5p² ?

• Tin

• Silicon

• Strontium

• Tellurium

Which wavelength emits the greatest energy?

• 459 nm

• 610 nm

• 210 nm

• 765 nm