How did the discoveries of scandium (sc) and germanium (ge) affect mendeleevâs work?

What does charles law state

Calculate the amount of energy released in the formation of one mole of BaSe bonds (not lattice energy). The radius of the barium ion is 1.35 Å, and the radius of the selenide ion is 1.98 Å. Note that 1Å=10-10m.

It's easier to determine the elecron configurations for the p-block elements in periods 1,2,3 than to determine the electrons configurations for the rest of the p-block elements in the periodic table beacause

Where are elements that form molecules of two of the same atoms commonly found on the periodic table?

Explain how gas pressure is measured.

Drinking water may contain a low concentration of lead ion (Pb2) due to corrosion of old lead pipes. The EPA has determined that the maximum safe level of lead ion in water is 15 ppb.

A student examines the temperature and precipitation on a given day using a thermometer and a rain gauge. The student is measuring- A. temperature only B. climate only C. wind speed only D. specific weather conditions

Atoms - 1 2 3 4 Protons - 8 10 9 8 Neutrons - 10 9 9 11 Electrons - 8 10 9 8 Which two are isotopes of one another?

A radioactive isotope has the same number of protons as its stable parent atom, but differs in its number of what?

A student experimentally obtained the density of osmium the densest element as 22.57g/cm3 the density of osmium is reported to be 22.48 g/cm3 determine the student percent error