Why is the periodic table shaped the way it is

What are some of the most toxic and deadly poisons known to mankind? And, what are their effects?

When 2 crystalline solid barium hydroxide octahydrate and crystalline solid ammonium nitrate are mixed in a beaker at room temperature, a spontaneous reaction occurs. the temperature of the beaker contents rapidly falls to below 0º c.

Which of the following is responsible for the exchange of gases in a leaf? the phloem the spongy mesophyll the stomata

Which of the following is a pure substance? A. chocolate milk B. orange juice C. seawater D. hydrogen peroxide (H2O2)

What is the cause of everyone in our solar system orbiting around the Sun?

Why are water storage tanks usually built on towers or hilltops?

What is convection cell

One example of a decomposition reaction is the electrolysis of water. the chemical reaction can be expressed by the equation 2 h2o →2 h2 o2. the reactant (s) of this chemical reaction is/are?

When the positive ion of one compound replaces the positive ion of another compound?

A 2.00 L container of gas has a pressure of 1.00 atm at 300 K. The temperature of the gas is halved to 150K, and the measured pressure of the same 2.00 Liter sample is 0.420 atm.