Answer:
D
Explanation:
Solar panels are not toxic, so option A goes out the window.
Aesthetics don't really matter, so option B follows it out.
Option C makes a little sense, but less so than Option D. They aren't nearly as heavy as some of our current energy production methods.
Solar panels are expensive, hard to store properly, and most are between 15 and 20 percent efficiency, compared with a diesel motor's 40 percent.
They can try to increase the amount of plants put in the ground because the plants take in the carbon and give us more oxygen to breath healthy.
Answer:
neon is about five times more massive than helium.
Explanation:
got this one right lol
Is it Technology? What have you already tried?
Answer:
Se⁻²
Explanation:
Even though the atom is not shown, we can consult the periodic table. Selenium (Se) is in group 6 and period 4, so it has 6 valence electrons. To be stable, the atom must have a noble gas configuration with 8 valence electrons, thus, selenium must gain 2 electrons.
When an atom gain electrons, it is negatively charged, because electrons have a negative charge. So, the ion formed is Se⁻².