The only given information is the time in 3 seconds. We are asked to find the position, or the distance traveled. The working equation to be used here is:
x = v₀t + 1/2 at²
where
x is the distance
v₀ is the initial velocity
a is the acceleration
In order to solve this, let's assume the object is free falling. So v₀ = 0 and a = 9.81 m/s².
x = 0 + 1/2 (9.81)(3)²
x = 44.145 meters
Metal (Ca) Polyatomic anion (CO3). You do not need to use the roman numeral because Ca is in group 1. The answer is metal + polyatomic or Calcium Carbonate
Atomic number is the number of protons in an atom. Since these are all Hydrogen, the number of protons remains the same, and the Atomic Number for each is 1. Mass number is the number of Protons and Neutrons in an atom. So, Protium is 1, Deuterium is 2, Tritium is 3. The number of neutrons is stated in the question (Protium 0, Deuterium 1, Tritium 2). Hope this helps, if you wouldn’t mind marking brandies if it did!
