Which are different forms of an element that have different numbers of neutrons? ions isotopes compounds molecules

An atom has at least one positive proton and at least one negative electron. Which of the following is true about the protons and electrons in an atom? A. Protons and electrons are far apart with empty space in between. B.

Arrange the following measurements, in seconds, from the greatest bias to the least bias. 6.63 ± 0.01 s, 6.6 ± 0.1 s, 6.52 ± 0.05 s, 6.4 ± 0.5 s

What is difference between a pH of 8 and a pH of 12 in terms of H + concentration?

A specific steroid has λmax = 259 nm and molar absorptivity ε = 11,500 l mol-1 cm-1. what is the concentration of the compound in a solution whose absorbance at 259 nm is a = 0.065 with a sample pathlength of 1.00 cm?

How to make bottled soda taste like fountain?

You live 15.0 miles away from a shopping center and wish to calculate the distance in feet. There are 5280 ft in one mile

What is shielding effect?

If you stand up in a rowboat and take a step towards the dock, you may fall in the water. Explain what happens in this situation. How is it similar to what happens when you take a step on land? How is it different?

3 A2 + B2 >>> 2 units of product 3 AA + BB >>> 2 products 3 volumes + 1 volume >>> 2 volumes product 3 liters + 1 liter >>> 2 liters product 3 moles A2 + 1 mole B2 >>> 2 moles product Click to get the correct formula for the product of the reaction.

The density of a substance with a mass of 48 grams and a volume of 3 ml is what