What is true about the element francium (Fr, atomic number 87) ? More than one can be true A) It has seven valence electrons. B) It is likely to form ionic bonds. C) It is in Period 7. D) It is nonmetal. E) It is a metal.

What corresponds to a pressure of 1.23atm

Which of the following has wavelength longer than the wavelength of viable light? A) X rays B) Gamma rays C) Radios waves D) Ultraviolet waves

Give reason Blue colour of copper nitrate is destroyed when silver coil is placed in a beaker of copper II nitrate

Atoms are so small that aboit 7.5 carbon atoms could fit into the period at the end of this sentence.

37.5ml of menthol is dissolved in water to make 456 ml of solution, what is the concentration expressed in volume/volume % of the solute?

Which set of procedures and observations indicates a chemical change? A) Ethanol is added to an empty beaker and the ethanol eventually disappears. B) A solid is gently heated in a crucible and the solid slowly turns to liquid.

If 100 grams citric acid react with 100 g baking soda how many grams of carbon dioxide?

What state of matter undergoes changes in volume most easily? a. solidb. liquidc. gasd. frozen

What was the result of the atomic theory?

Explain mitosis and meiosis in your own words.