Helium 2 He 27 4.0026 2. 1. What is the atomic mass of Helium? Using that, determine the number of neutrons in a Helium atom. Atomic Mass= Neutrons=

2.What is the atomic number of Helium? What subatomic particle does it refer to? *Remember APE MAN! He (Helium) Atomic Number= Atomic # is equal to the # of HA

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante