Which one of these elements is an alkaline earth metal

A student prepared an unknown sample by making a dilute solution of the unknown sample. The dilute sample was prepared by adding 5.0 mL of the unknown sample to a 25.0 mL flask.

A big blue ball! You can see a big blue ball. Select the two properties of light that enable you to see the ball. A) energy and wavelength) reflection and absorption) reflection and refraction) absorption and transmission

As a barometer rises, what kind of weather can be expected

What type of a reaction occurs when potassium metal reacts with fluorine gas?

Which is unique to the tire of the car A. Alignment marks B. Tread mark C. Trench marks D. Skid marks

How many atoms of chlorine would a molecule of carbon tetrachloride have? a. 0 c. 4 b. 1 d. 7

Suppose you perform an experiment at 21.5 oc and 1.00 atm and generate helium gas in the laboratory. what do you expect the molar volume of the helium to be?

Which best describes Rutherford's model of the atom? fish swimming in an aquarium a sports stadium with a marble at the center a scoop of chocolate chip ice cream a dense, solid ball

Which reaction represents the process of neutralization? Mg (s) + 2HCl (aq) MgCl 2 (aq) + H 2 (g) HCl (aq) + KOH (aq) KCl (aq) + H 2 O (l) C. Pb (NO 3) 2 (aq) + CaCl 2 (aq) Ca (NO 3) 2 (aq) + PbCl 2 (s) D. 2KClO 3 (s) 2KCl (s) + 3O 2 (g)

Which of the following is a correct representation of the isotope of carbon that has 7 neutrons? carbon-7 carbon-13 carbon-6 carbon-12