What is the collection of protons and neutrons in the center of an atom called

How much energy is required to raise the temperature of 3kg of iron from 20 degrees Celsius to 25 degrees Celsius

Classify each item as a pure substance or a mixture: (a) blood; (b) ocean water; (c) a piece of wood; (d) a chunk of ice.

Which of the following substances would be the softest? CuO SiC C25H52 Zn

How is a salt formed during a neutralization reaction? A. A hydrogen ion reacts with a hydroxide ion. B. An acid changes to a different state of matter. C. A metal ion takes the place of the hydrogen of an acid. D.

Research Question: What is the relationship between honeybees and the agricultural economy?

Compare and contrast steak and juice

Which of the following laboratory tools would be most appropriate for determining the volume of and irregular shape A) ruler B) triple beam balance C) graduated cylinder D) answers b and c

What type of change is the process of photosynthesis

A graduated cylinder is filled to the 40.00-mL mark with a mineral oil. The masses of the cylinder before and after the addition of the mineral oil are 124.966 g and 159.446 g, respectively. In a separate experiment, a metal ball bearing of mass 18.

Which element in Group 15 has the greatest metallic character? 1) N 2) P 3) Sb 4) Bi