Which of the following are likely to form an ionic bond?

• copper atoms

• hydrogen atoms

• hydrogen and oxygen atoms

• copper and fluorine atoms

What is the electron structure of nitrogen? 1s22s22p3 1s22s23s22p1 1s32s32p1 1s12s12p5

Explain how the specific densities of two objects determine which will float on which?

What relationship do you find between the pH number and the power of 10 used to express the [H+]? pH = exponent of concentration values pH = reciprocal of the H + concentration pH = the negative of the exponent of concentration pH =

18. Ca (s) + 2HNO2 (aq) + Ca (NO2) 2 (aq) + H2 (9) What type of chemical reactions is the chemical reaction described above?

The table below shows some values of f (x) and g (x) for different values of x: x f (x) = 15x - 12 g (x) = 3x - 2 0.11 - 1 - 27 0.33 0 - 12 1 2 Complete the chart and determine the solution of the equation f (x) = g (x). x = - 1 x = 0 x = 1 x = 3

Why are ethics important when considering experiments? O A. It is important that people are not harmed for the sake of science. O B. Scientists would not be able to get funding if their experiments were not ethical. O C.

When the pH value of a solution is changed from 2 to 1, the concentration of hydronium ions ... A) decreases by a factor of 2 B) increases by a factor of 2 C) decreases by a factor of 10 D) increases by a factor of 10

Nonmetals rarely lose electrons in chemical reactions because?

Does a steel marble have more kinetic energy than a ceramic marble

What types of weather are associated with cold fronts?