True or false: The elements in a group of the periodic table have similar characteristics

Which statement best explains why Newton's first law is correct even though real-world objects tend to eventually stop moving instead of remaining in motion? A.) Newtons first law does not apply in the real world. B.

A farmer wants to know if a new pesticide will produce better tomatoes than his old pesticide. Which of the following is the best hypothesis to use to address his question? O A.

Istinguish between ionic and molecular compounds in terms of the basic units that each is composed of.

Write a balanced formation equation at standard conditions for the compound HCN.

Lightning is a very large flow of electrical energy. Describe the type of energy that creates the electrical energy.

Write the net ionic equation, including the phases. 2hbr (aq) + ba (oh) 2 (aq) - - - > 2h2o (l) + babr2 (aq)

A student needs to prepare 50.0 mL of a 1.30 M aqueous H2O2 solution. Calculate the volume of 5.0 M H2O2 stock solution that should be used to prepare the solution.

Which of the following is the best name for a compound made from nitrogen and oxygen? (N2O3) nitrogen oxide nitrogen II oxide nitrogen trioxide dinitrogen trioxide

Write the element symbol for the element with the abbreviated electron configuration [ne]3s23p2.

2. Describe in a step by step manner how you determined the identity of the two unknowns. Discuss both what you determined the unknowns to be and the method that you used to find them.