Which of the following elements is classified as a nonmetal

Xe

Ca

Sb

Cu

Which scientist observed that compounds are always joined together in fixed ratios? A. Boyle B. Bohr C. Lavoisier D. Proust

What Is the number of photons in one J of red light (650 nm) greater than, equal to, or less than the number of photons in one J of blue light (450 nm) ?

Which chemical formula represents a diatomic molecule? answers?

What does it mean for an element to be reduced?

What are two non metals in tooth enamel?

5 jobs of your bones

So I found out that the Apollo 11's guidance computer had 2k memory but like of what? 2,000 Terabytes? Basically I would like to know the units

Given an activity series in which the most active metals are at the top of the list and the least active metals are at the bottom of the list, would copper be listed above silver or would silver be listed above copper?

The number of Joules needed to raise the temperature of 10 grams of water from 20°C to 30°C is

Two samples of carbon tetrachloride were decomposed into their constituent elements. One sample produced 38.9 g of carbon and 451 g of chlorine, and the other sample produced 14.8 g of carbon and 135 g of chlorine.