An atom of magnesium has an atomic number of 12 and a mass number of 24. how many protons plus neutrons are in the nucleus

When two elements form two different compounds, the masses of element B that combine with 1 g of element A can be expressed as a ratio of small whole numbers.

When 0.400 mole of potassium reacts with excess water at standard temperature and pressure as shown in the equation above, the volume of hydrogen gas produced is: 2 k (s) 2 h2o (l) → 2 k (aq) 2 oh - (aq) h2 (g) ?

Study the diagram below Warm water runs over hands Particles in hands move faster ? Which of these belongs in the blank box?

What is thd different between a waxing crescent and a waning crescent moon?

Hydrogen gas (H2), methane gas (CH4), and a liquid called hexane (C6H14) all burn when lit with a match. They all combine with oxygen to produce carbon dioxide gas (CO2) and water (H2O) when they burn.

How to find the better buy of two of the same item, but they have different units of measurements and different costs.?

The agricultural practice of spraying insecticides leaves behind which pollutant in the soil? A. Chemical poison B. Excess nitrogen C. Excess salt D. Acidic compounds

What is the name of the compound composed of iron and carbonate? [hint: iron has a + 3 charge in this compound]?

In a chemical equation the products appear on which side of the equation? A. Left B. Top C. Right D. Bottom

What does the shape of a protein molecule resemble?