Midterm Regents Chemistry Review

In which segments is the potential energy increasing? 

Gold foil experiment

Discovered the electron

An atom has  a mass of 40u and has 15 neutrons. What element is it?

Plum pudding model 

The attraction an atom has for  valence electrons in a bond?

sublimation 

Condensation 

Which two subatomic particles make up the mass of an atom?

How much heat is needed to melt 50 grams of ice?

nucleus is a dense positive structure 

Energy needed to remove the most loosely held electron from an atom ?

Excited versus ground state

atoms are indivisible 

100 K is equal to _____^OC

Found in orbitals according to the wave mechanical model

What happens to the number of energy levels as you across a period?

Which of the following element is the most metallic

What is the polarity of this molecule?

What is the shape of this molecule?

How many valence electrons does an atom F have?

Sublimation 

melting 

no charge 

mass of 1u  and no charge

What happens to the volume of a gas when the pressure increases?

Flame test

Empty space

makes the nucleus positive 

Which two subatomic particles determine the atomic charge?

In which segment do we find the state of matter with indefinite shape and definite volume?

How many electrons are in  Mg⁺²?

discovered by Henry Mosely 

Freezing

Which of the following elements belongs to the halogens?

Atoms of the same element have the same mass ( didn't know about isotopes)

Definite proportions 

How many energy levels does an atom of calcium have?

The number of protons and neutrons equal 

What happens to the atomic radius within a group?