Atomic Structure & the Periodic Table

Which of the following in the ground state has only one electron in each of the three "p" orbitals?

• Lithium

• Nitrogen

• Oxygen

• Fluorine

Which of the following has the smallest atomic radius

• Lithium

• Nitrogen

• Oxygen

• Fluorine

Tags

NGSS.HS-PS1-1

Which of the following has the smallest value for first ionisation energy?

• Lithium

• Nitrogen

• Oxygen

• Fluorine

The third ionization energy of titanium is represented by which equation below?

• Ti²⁺_(g) → Ti³⁺_(g) + e^-

• Ti3⁺_(g) + e^- → Ti²⁺_(g)

• 3Ti_(g) → 3 Ti⁺_(g) + 3e^-

• Ti_(g) → Ti³⁺_(g) + 3e⁺

Which of the following elements has the largest ionic radius?

• Cl^-

• S^2-

• K⁺

• Ca²⁺

Which of the following nuclear reactions describes the absorption of an alpha particle and release of proton?

• ²₁H → ¹₁H

• ²³⁸₉₂U → ²³⁴₉₁Pa

• ¹⁴₇N → ¹⁷₈O

• ²³⁸₉₂U → ²³⁴₉₀Th

Which of the following statements is true?

• All atoms of a given element contain the same number of neutrons

• Chemical reactions cannot change the nuclear composition of atoms

• John Dalton discovered the first subatomic particle

• Isotopes and isomers are the same thing

Which of the following statements about hydrogen is incorrect?

• The most abundant isotope of hydrogen is present in a 99.9% abundance on earth

• Hydrogen atoms do not possess any neutrons

• A hydrogen ion is simply a subatomic particle

• Deuterium atoms do not possess any neutrons

Which position shown on the diagram below best shows the deflection of ions between the two magnetic plates?

• A

• B

• C

• D

A sample of an element X was analysed and was found to consist of four isotopes of mass and relative abundance as shown in the table below. Calculate the relative molar mass of element X.

• 15.61

• 16.75

• 15.50

• 17.00