The ______ ________ is a chart in which the elements are organized according to their properties.
What is periodic table
100
The nucleus of an atom contains _______ and ________.
What is protons and neutrons
100
Recent experiments have shown that protons and neutrons are made up of smaller parts called ________.
What is quarks
100
____________ is the central core of an atom.
What is nucleus
200
An _____________ is a negatively charged particle.
What is electron
200
A _____________ is a positively charged particle.
What is proton
200
A chemical reaction is a process that produces one or more different ____________.
What is substances
200
The periodic table was constructed by______________.
What is Mendeleev
200
________________ are positively charged atomic particles.
What is protons
300
Scientist use ______________ to study the structure of crystals.
What is X rays
300
A substance made of only one kind of atom is an ____________.
What is element
300
In Rutherford's model of the atom, __________ are the type of particles shown orbiting the nucleus. (hint in our models they are represented with the yellow clay)
What is electrons
300
Elements of families on opposite sides of the periodic table often react to form _____________. (water is an example of one)
What is compounds
300
____________ are negatively charged atomic particles.
What is electrons
400
A ______ _______ is a process that produces a new substance from one or more other substances.
What is chemical reaction
400
A ______________ has no charge.
What is neutron
400
The larger the atomic number of an element, the greater its _______.
What is mass
400
X-ray diffraction enables scientists to study the structure of _______________.
What is crystals
400
____________ are particles with no electrical charge.
What is neutrons
500
A ______________ is made of atoms of two or more different substances.
What is compound
500
Protons and neutrons are found in the _____________ of an atom.
What is nucleus
500
The compound iron oxide contains atoms of _______ and ____________.
What is iron and oxygen
500
An element is any substance made of one kind of ___________ only.
What is atom
500
Every column in the periodic table contains a ___________ of elements.