Arrange the following elements in order of increasing atomic radii. Rb, Indium (In), Ge, O, P Group of answer choices O < P < Ge < In < Rb Rb < In < Ge < P < O P < O < Ge < In < Rb O < P < Rb < In < Ge O < P < In < Ge < Rb In < Ge < Rb < P < O P < O < In < Ge < Rb Ge < In < P < O < Rb

O<P<Ge<In<Rb

Explanation:

In the periodic table atomic radii decreases across a period when we move from left to right and decreases down the group.

Given:

Rb,In- both are of same period (So the atomic radii decreases when we move from left to right)

In, Ge- Ge belongs to copper family

     In- In belongs to boron family

for In, Ge, O, P in each one extra shell gets added.

So the order of increasing radii will be

O<P<Ge<In<Rb

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.