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A cation is ______ because it has ________electrons, while an anion is ________ because it has _______electrons.

For each of the following put the correct number of sig. figs. (if the number is exact then put the word exact) 0.02310 g [4] 13,200 m [3] 78 marbles [E] 23.090 cm [5] 134.000 mL [6] 0.00031 mg [2]  

A cation is ______ because it has ________electrons, while an anion is ________ because it has _______electrons.

If a measurement is not close to the true value but reproducible, it is:

The Elves have discovered an unknown cube on an island in the ocean. They want to know if they can float the cube from the island to the mainland. The cube measures [L] ft on each side and has a mass of [m] lb. The ocean on their planet has a density of [d] g/mL. Determine the density of the cube and tell the Elves whether the cube will float or sink in the ocean.

The lead weapons manufacturer is working on a ray gun for the dragon to stun the unicorn. The ray gun has a Wavelength of [w] nm. What is the frequency, in Hz, of the ray gun? ( 5 points) 1m= 1*109 nm and speed of light is 2.998*108 Enter your answer  has a whole number and assume it  look like this X *1014

The element that make dogs special is called “Pup” it has two isotopes: First Isotope of Purr  = [Y]  amu, abundance = 20.32% Second Isotope of Purr = [X] amu, abundance = 79.68% Determine the atomic mass (with 1 decimal place) that should be placed on the periodic table for the element “Pup”.

Consider the element Iron, as a neutral atom… How many protons does it have? [P] How many electrons does it have? [E] How many neutrons does it have? [N]

According to the textbook, at what critical pH does demineralization occur?

Identify the classification of caries: