An atom that has 13 protons and 15 neutrons is an isotope of the element

Thallium consists of 29.5%TI-203 and 70.5%TI-205. What is the relative atomic mass of thallium

Ice has the density of 0.93 g/cm3, and water has a density of 1.0 g/cm3. Will ice float or sink in water?

What type of radioactive decay involves two protons and two neutrons? alpha emission beta emission positron emission gamma rays

What if cell differentiation did not occur?

Scientific notation (6.0 x 10^4) (3.1 x 10^-1

Not related to any subject but how do you tell someone you like them?

An aspirin tablet contains 75.0 mg of aspirin, which has the molecular formula, c9h8o4.

What are elements in the same row or period called

1. Physical geography examines the culture, political systems, social systems, economic systems, and characteristics of various peoples-why they eat certain foods, practice a chosen religion, or why they select a particular mode of transportation. A.

A gas has a pressure of 2.0 atm. If the temperature decreases from 250K to 125K and the volume remains constant, what will be the resulting pressure?