What happens to paper chromatography in you leave it in water for too long?

A) State the number of valence electrons for the element O? B) An element with 5 protons, has how many electrons? C) If an element has 4 electrons and an atomic mass of 9, what element is it?

based on the positions in the periodic table, which two elements would mostly readily combine to make a stable compound

6. Calculate the molarity if 35.0 grams of KBr are dissolved in 700. ml?

What Type of energy conversion occurs when you place your feet near the fire place and They become warm

The phosphate functional group in the non cyclic adenosine monophosphate molecule contains "acidic hydrogens". Explain what this phrase means.

What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N2 gas when the ammonium nitrite in 1.00 L of 0.500 M NH4NO2 decomposes at 25.0°C?

Read the given equation. Na2O2 + CO2 → Na2CO3 + O2 What volume of O2 gas is produced from 2.80 liters of CO2 at STP?

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?