How did mendeleev arrange atoms in the periodic table?

A sample of sodium reacts completely with 0.213 kg of chlorine, forming 351 g of sodium chloride. What mass of sodium reacted?

A positive particle in the nucleus of an atom? proton, electron, electric charge, attract, repel, positive ion, negative ion

An investigation that is controlled is what

How many moles of mgsio3 are in 199 g of the compound?

Tear gas products are less effective against violent attackers. true or false

What is a property of a combustion reaction? A. Oxygen gas, O2, is a reactant. B. The products are simpler than the reactants. C. The reactants are simpler than the products. D. An uncombined element is on the reactant and product side.

For an endothermic reaction at equilibrium, the addition of a catalyst Group of answer choices causes no shift causes a shift to the right causes a shift to the left makes it an exothermic process

The atomic number of an element best corresponds to which of the following? O The mass of an atom of that element. O The number of electrons orbiting the nucleus of an atom of that element.

If a dinosaur once lived in mexico, and i now live in arkansas, can i be drinking the same water the dinosaur did?

Dough to which potassium bromate has been added rises better, producing a lighter, larger volume loaf.