Which of the following elements has the highest ionization energy in the second period?

Which group in the periodic table contains elements that form acidic oxides?

The element with atomic number 15 is in which group and period of the periodic table?

Which of the following pairs of elements are most likely to form an ionic bond?

Which of the following elements has the electron configuration [Ne]3s²3p³?

Which element in the third period has the highest electronegativity?

Which of the following elements has the most metallic character?

Which element commonly exhibits an oxidation state of +2?

Which element in group 1 has the highest reactivity?

According to the modern periodic law, the properties of elements are periodic functions of their:

Which of the following elements has the smallest atomic radius?

Which of the following elements has the highest electron affinity?

Which of the following elements is a transition metal?

Which of the following elements is least reactive?

Which of the following pairs of elements will form an ionic bond?

Which of the following elements has the highest electronegativity?

Which of the following elements has the highest electronegativity?

Which element in group 2 has the highest ionization energy?

The elements in the same period have:

Which element has an atomic number of 20?

Which of the following elements has the lowest ionization energy?

Which of the following elements has the electron configuration [Ar]4s²3d¹⁰4p¹?

Which of the following elements has the smallest atomic radius in the third period?

Which of the following elements is the most reactive non-metal?

How many valence electrons does an atom of sulphur have?