1. To what group in the periodic table do the elements listed belong ? 2. Why these elements are called the noble gases ? What is their common characteristic ? 3. Why are light bulbs filled with argon gas rather than oxygen gas ?

Sharing Covalent bonding is explained as a bond that forms when atoms are electrons. When the two atoms get close enough, the nucleus of one atom weakly attracts the other atom's (Protons / Neutrons / Electrons ). When the two atoms get even closer, the nucleus of one atom has a strong attraction for both its_uclei and the electron from At this point both atoms are attracting ● You can see that the electrons spend almost all their time the two nuclei. When showing the attractions from another nucleus you can see that it is also pulling on both electrons. This is a bond. The atoms are both trying to one can take them away from the other. This creates a situation where both atoms are together. What region of the periodic table are their atoms that attract electrons strongly? Non Metals the same electrons, but neither H B

A monatomic ion with a charge of -2 has an electronic configuration of 1s22s22p63s23p64s23d104p65s24d105p6.This ion is a(n) _______cation anion.What is the chemical symbol of the noble gas this ion is isoelectronic with? Xe.What is the formula of the ion? Ba2+.

6. Draw Bohr atomic models for elements Helium, Magnesium, Oxygen and Krypton 7. How many protons, electrons and possible neutrons does a neutral sodium atom have? 8. Sodium usually becomes an ion to be stable. How many protons and electrons does Na* have? 9. How many protons, neutrons and electrons does a carbon-14 atom have? 10. How many protons, electrons and possible neutrons does F1 have?