identify the following atoms using thier symbols. h. the matalloid in the secound period. i. the element with the fewest number of electrons in the sixth period. j. the third period element with the largest  number of electrons.

atomic number is the number of  1. radioactive isotopes of an element 2. protons in an atom of an element 3. protins and electrons in an atom of an element 4. neutron in an atom of an element

A certain neutral element has 2 electrons in the first level, 8 electrons in the second level, 18 electrons in the third level, and 2 electrons in the fourth level. List the following infor- mation for this element: a. atomic number b. total number of s electrons total number of p electrons d. total number of d electrons e. number of protons С.

An element in the third period of the periodic table looses 2 electrons to be isoelectronic (same nomber of electrons) with the noble gas in that period. What is the element and what is the noble gas? Select one: a. Mg and Ne b. Na and Ne c. Ca and Ar d. S and Ne

Write the ion symbol for an atom with the given number of protons and electrons. a. 27 protons and 25 electrons b. 12 protons and 10 electrons