Why in group 1, the reactivity increases

1) The senses are used to make which of the following? A) inferences B) predictions C) evaluations D) observations 2) You walk into the kitchen and see a broken egg on the floor.

A student is given the question: "what is the mass of a gold bar that is 7.379 * 10-4 m3 in volume? the density of gold is 19.3 g/cm3."

Calculate both the number of moles in a sample of chromium containing 5.00 1020 atoms and the mass of the sample.

Above what fe2 concentration will fe (oh) 2 precipitate from a buffer solution that has a ph of 8.59? the ksp of fe (oh) 2 is 4.87*10-17.

The idea of arranging the elements in the periodic table according to their chemical and physical properties is attributed to

What happens to the particles of a substance when thermal energy is added to the substance? A.) it's particles do not vibrate at all. B.) it's particles move faster. C.) it's particles move closer together. D.). It's particles move slower.

Suppose that you drop three objects into a glass of water: a piece of styrofoam, a piece of oak, and a gold ring. Which float, and which sink? density of styrofoam: 0.005 density of gold ring: 19.32 density of oak: 0.70

How many molecules following formula 3Al2 (SO4) 3

Will mark branliest. Calculating percent yield: For the reaction Cu + 2AgNO3 → Cu (NO3) 2 + 2 Ag, adding 127 grams of copper to lots of silver nitrate yields 410 grams of silver. What is the percent yield of silver? I'm desperate.

Which of the following are considered strong bases? That is, they are capable of doing E2 reactions. (choose all that apply) Hydroxide, OH- Ammonia, NH3 Water, H20 ОMethanol, Снзон Methoxide, CH30- Cyanide, CN- Amide, NH2-