An atom's mass number is 210 and its atomic number is 85. How many neutrons does the atom have

0.052301 km significant figures

Which statement best explains why radon and krypton do not bond easily with other elements

How could you tell if a sample of matter is an element

Sodium carbonate is often used in certain candies to create fizzy bubbles when solid weak acids in the candy are dissolved with saliva. Explain the fizzing effect.

How many electrons in an atom can have each of the following quantum number or sublevel designations? (a) 2s (b) n = 3, l = 2 (c) 6d

Write an equation for the reaction of hydrogen chloride and sodium sulfide to produce hydrogen sulfide with sodium chloride. 1. Show the formulas of the reactants 2. Show the formulas of the products. 3. Write the balanced equation for this reaction

Martha has a large amount of 1.25 M H2SO4 in her lab. She needs 36 grams of H2SO4 for a chemical reaction she wants to perform. How many liters of solution should she use?

A student makes observations when water is added to a blue solution of copper sulfate. The student makes only 1 observation: the solution changes to a lighter shade of blue. Is this an example of a chemical reaction? Explain your reasoning.

When dos the spring tide occur

As ice transforms into steam, Question options: new molecules are formed. the types of atoms are changed. energy is absorbed by the molecules. the mass of the molecules is increased.