What are the main ways that carbon dioxide enter the atmosphere?

The value of Zeff for a valence electron in an atom of silicon is?

How do sedimentary rock form? its science the sedimentary rocks

Identify this symbol. cl-. 1) anion 2) cation 3) atom 4) molecule

When a 0.680 g sample of olive oil is burned in a calorimeter, the heat released increases the temperature of 370 g of water from 22.7 ∘C to 38.9 ∘C. What is the energy value of the olive oil in kJ/g?

A solution has [oh-] = 4.0*10-8. what is the value of [h+] for the solution? answers

Which property can be defined as the ability of a substance to be hammered into thin sheets

Select the group of organelles that is common to both plant cells and animal cells. A. nucleus, cytoplasm, ribosomes, chloroplasts B. cell wall, ribosomes, cell membrane, mitochondria C. cytoplasm, mitochondria, cell wall, nucleus D.

A compound is found to have a composition of 70.4% carbon and 29.6% hydrogen, by mass. what is the empirical formula for the compound?

As you go down a family or group on the periodic table * the atoms become smaller and smaller. the elements become less reactive. the elements become more reactive. the atoms have more and more valence electrons.

What is the name of the horizontal rows in the periodic table?