Lenses can be found in a variety of objects. Which example does not contain a lens?

an electron microscope

night vision goggles

a diving mask

a smart phone

Fluorine has an atomic number of 9, how many electron shells does it have?

What is the purpose of the piece of filter paper inside the 400 mL beaker?

In Period 3, from left to right in order, each successive element will (1) decrease in electronegativity (2) decrease in atomic mass (3) increase in number of protons (4) increase in metallic character

One isotope of oxygen has 8 protons and 10 neutrons. Which is the correct reference for this isotope? A. oxygen-18 B. oxygen-2 C. oxygen-8 D. oxygen-10

1. How many moles are in 493.4 grams of calcium phosphide?

What were the expected results of Rutherford's gold foil experiment, based on Thomson's model of the atom? How did the real results of the gold foil experiment change the accepted model of the atom?

How many neutrons are in titanium

What planet has the largest known mountain in the solar system Two Moons and a period of rotation equal to 24.6 hours

A solution is another name for

Which of the following solute and solvent combinations would be most likely to form solutions? Mark all that apply.