Who first proposed the idea of an atom?

What happens when a chemical is determined to be dangerous?

What is the density of lead if a piece of Lead 1 cm by 20 cm by 30 cm has a mass of 6800 grams

The student is now told that the four solids, in no particular order, are aluminum chloride (AlCl3), sugar (C6H12O6), benzoic acid (C6H5COOH), and sodium bromide (NaBr).

What is sodium and the polyatomic ion nitrate chemical formula

The weight of an object is the product of its mass, m, and the acceleration of gravity, g (where g=9.8 m/s2). If an object's mass is m=10. kg, what is its weight?

In the reaction 2H2O (l) + 2Cl - (aq) → H2 (g) + Cl2 (g) + 2OH - (aq), which substance is reduced? A. H2O B. Cl C. H D. OH E. None of the Above (This is not a redox reaction.)

Which statements about the periodic table's organization are true? Select all that apply. The periodic table is organized by atomic number. The periodic table is organized by reactivity. The periodic table is organized by atomic mass.

He definition "'oxygen' means an element having an atomic weight of 8 and an atomic number of 16" is an example of:

From oxygen silicon chlorine argon which one is a metalloid

Which of the following transfers carbon from the nonliving environment to the living environment? Photosynthesis Cellular respiration Burning Decomposing