What element has 4 valence electrons and is in period 6

The temperature of a 95.4 g piece of Cu increases from 25.0 °C to 48.0 °C when the Cu absorbs 849 J of heat. What is the specifc heat of Cu

A sample of cesium is 75.00% Cs-133, 20.00% CS-132, and 5.000% C$-134. What is the average atomic mass of cesium? Round your answer to four significant figures. A 132 amu B 132.8 amu C 132.9 amu D 133 amu

Select the more electronegative element in each pair. O F O Br O s O o O N O P O K O Ca

Convert 325 milliliters to liters. A:0.325 liters B:3.25 liters C:32.5 liters D:325 liters

Which of the following isotopes is radioactive A) C-12 B) Pb-206 C) Tc-99 D) Ne-20

The molality of a solution is a measure of - A - moles of solute per kilogram of solution B - moles of solute per liter of solution C - moles of solute per kilogram of solvent D - moles of solute per liter of solvent

Which technology has allowed for exploration beyond our solar system? A) space probe B) space station C) space shuttle D) space observatory

Which carbonate is most stable to heat? A. Sodium carbonate B. Copper (ii) carbonate C. Zinc carbonate

How many liters of 0.75 M solution can be made using. 336 moles of lead (II) oxide?

Which molecule, when added to a solution, would give the solution the highest ph? A. HCI B. H2SO4 C. KOH D. H2O