Answer:
stay the same.
Explanation: Period 3 consists of the full 1s, 2s, and 2p electron orbitals, plus the 3s and 3p valence orbitals, which are filled with a total of 8 more electrons as we move from left (Na) to the far right (Ar):
Na: 1s2 2s2 2p6 3s1
Ar: s2 2s2 2p6 3s2 3p6
As we move from left to right, and ignoring the already-filled 1s, 2s, and 2p orbitals, the period three starting and ending elements have the following:
Na: 3s1
Ar: 3s2, 3p6
All the new electrons electrons filled the third energy level (3s and 3p). So the energy level does not change, just the orbitals.
<u>c.</u> 12. preparing data tables and gathering safety equipment
<u>b.</u> 13. reading all instructions before beginning a science lab
<u>a.</u> 14. recognizing what a picture of a hand means
<u>e.</u> 15. wiping your work area with a wet paper towel
<u>d.</u> 16. wearing goggles and an apron
Like A B C D or like a mailed letter
Answer:
Scientists use the term magma for molten rock that is underground and lava for molten rock that breaks through the Earth's surface.
