How many valence electrons does neutral atom of aluminum have

1234567891011 Why isn't DDT an ideal pesticide? Select all that apply. It did not work well at wiping out the insect population. Over time insects started to become resistant to DDT.

Carrying capacity is the maximum population that a given area can support. am I right?

In two or more complete sentences, compare single displacement reactions and double displacement reactions.

Which one is a balanced equation?

Scientific theories can change over time as new information is discovered if a scientific theory changes does this mean that it was not a good theory to begin with

What are the similarities between low mass stars and high mass stars

The atomic number of calcium (Ca) is 20, and it's mass number is 40. What is true about the subatomic particles that make up a neutral atom of calcium? A) It has 20 protons, 20 neutrons and 20 electrons.

Explain why a sidewalk has built-in cracks every few feet?

How many periods does the periodic table have? 7 18 9 8

Which one is correct A. It allowed them to escape B. It allowed them to chase down C. It allowed them to reach food D. All of these