Midterm Review

Science Toolkit

100

This is the basic unit for mass 

what is kilogram

200

This is the study of matter and the changes it undergoes

What is chemistry

300

the metric system is based on the power of what number

what is 10?

400

This is the basic unit for density

g/ml or g/cm^3

500

This branch of chemistry contains the study of carbon or those molecules that contain carbon

organic chemistry

Matter

100

All forms of matter is composed of __________

atoms

200

If a solution has 2 distinct phases that can be separated by physical mean then the solution is considered to be this type of solution

heterogeneous

300

Boiling point, melting point and hardness are examples of this type of property

physical

400

The rusting of nail is considered to be this kind of change

chemical

500

A homogenous mixture can be also called this 

solution

Inside the Atom

100

This number tell you the number of protons in the element

atomic number

200

This subatomic particle was discovered by JJ Thomason 

electron

300

An element that has same number of protons but different number of neutrons is called this

Isotope

400

Protons and neutrons are composed of what even more elementary particle

quark

500

This name is given to an atom that has an unequal number of protons to electrons

ion

Radiation

100

These are the three types of radiation that can result from radioactive decay

alpha, beta, gamma

200

This particle is the same size and charge of an electron

beta

300

This type of nuclear reaction occurs in the stars to create heat and light

fusion

400

This type of nuclear reaction occurs in nuclear power plants and nuclear bombs 

fission

500

This is the name of the female scientist that discovered radiation. Her lab is still radioactive today

Marie Curie

Periodic Table

100

This is name of the scientist that is credited for the creation of the first periodic table

Dimitri Mendeleev

200

This family is most stable family on the periodic table

noble gas

300

As you move from left to right across the periodic table, the atomic radius tends to 

decrease

400

This family is most reactive family of the metals. They usually have only one valence electron and are explosive in water

alkali metals

500

Each group across the periodic table has the same number of 

valence electrons