Who established using atomic numbers as the basis for organizing the periodic table?

1. list three facts about a solstice 2. which shape describes a plants orbit? A. a circle B. an ellipse C. a straight line 3. why is Venus hotter than Mercury? A. Venus's surface is covered with lava B. Venus has a strong greenhouse effect

There are two naturally occurring isotopes of boron determine the abundance of each isotope

In the following reaction, which compounds are considered based? HNO2+H2O H3O + NO2 A) H2O and NO2 B) HNO2 and H2O C) H2O and H3O D) H3) and NO2

Is that the right answer

Subatomic particles has a mass of 1.7 x 10-27 kg

Tiffany leaves balloons filled with helium gas inside her car in on a sunny day when she returns to her car some some of the balloons are much larger and a few have popped explain what happened

If the pH indicator bromothymol blue was added to the nitric acid solution, it's colour would be?

Which statement describes a chemical reaction? Atoms in the products are rearranged to form new substances. Atoms in the reactants are rearranged to form new substances. Atoms in the products change into new atoms to form new substances.

The gases CO₂ (g) and NH₃ (g) can be liquefied at 20°C by compressing them to sufficiently high pressures. A student claims that NH₃ (g) can be liquefied at a lower pressure than CO₂ (g) can be liquefied.

Which is a pure substance A) mixture B) solution C) element