Explain how calcium (40Ca20) and flourine (19F9) became stable when they form calcium fluoride.

Arrange the following Elements from greatest to least tendency to accept an electron.? Rank from greatest to least tendency to accept an electron. To rank items as equivalent, overlap them. Sr, Sn, Rb, Te, I

Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars every day.

Identify the following as abiotic or biotic. A paramecium swimming in a lake

Convert the following to Fahrenheit 10 Celsius 30 Celsius 40 Celsius 37 Celsius 0 Celsius

A roast was cooked at 325 °F in the oven for 4 hours. The internal temperature rose from 32 °F to 145 °F. What was the average rise in temperature per hour?

Over millions of years, how do weathering and erosion change a mountain made of solid rock

3H2 (g) + N2 (g) 2NH3 (g) This reaction has a equilibrium constant of 4.51x10-5 at 450 °C and initially contains 5.4 atm NH3, 2.7 atm N2, and 1.4 atm H2.

How many electrons are in the highest energy level of sulfur? A. 2 B. 8 C. 6 D. 4

Two identical atoms from Area B bond together. What type of bond will they most likely form A. Electrostatic B. Metallic C. Ionic D. Covalent

Why are molecule atoms as far away from each other as possible