Electronic Configuration of Elements Quiz

2, 1

Valence electrons are the electrons in the outermost shell of an atom.

Valence is the number of chemical bonds an atom can form with univalent atoms.

<p>The valency of an element is the number of atoms of hydrogen with which one atom of the element can combine.</p> Signup and view all the answers

<p>The number of valence electrons in the outermost shell of an atom determines its chemical activity.</p> Signup and view all the answers

<p>Electronic configurations are represented by writing the distribution of electrons in different energy levels or shells.</p> Signup and view all the answers

<p>In Bohr's model, electrons orbit the nucleus in fixed energy levels or shells at specific distances.</p> Signup and view all the answers

<p>Valency is the combining capacity of an atom. It is determined by the number of electrons in the outermost shell of an atom (valence electrons).</p> Signup and view all the answers

<p>Two shells are occupied in the nitrogen atom.</p> Signup and view all the answers

<p>Helium has a completely filled first shell.</p> Signup and view all the answers

<p>The first shell can accommodate a maximum of 2 electrons.</p> Signup and view all the answers

<p>The electronic configuration of an element with atomic number 11 is 2, 8, 1.</p> Signup and view all the answers

<p>Isotopes are atoms of the same element with different numbers of neutrons. Isobars are atoms of different elements with the same mass number.</p> Signup and view all the answers

<p>Electrons fill lower energy levels before higher ones, following the Aufbau principle, Pauli exclusion principle, and Hund's rule.</p> Signup and view all the answers

<p>The maximum number of electrons that can be accommodated in the third shell is 18.</p> Signup and view all the answers

<p>Atomic number is the number of protons in an atom's nucleus. Mass number is the sum of protons and neutrons in the nucleus.</p> Signup and view all the answers

<p>In the M shell of an element with atomic number 16, there are 10 electrons.</p> Signup and view all the answers

<p>The electronic configuration of an element with atomic number 9 is 2, 7.</p> Signup and view all the answers