Matter & Change
Atoms
Electrons
Periodic Law
Chemical Bonding
100
The study of matter and changes in matter best describes this branch of science.
What is chemistry?
100
The concept that atoms are indivisible is explained in this law.
What is the law of conservation of mass?
100
In SI, the frequency of electromagnetic radiation is measured in these units.
What is the Hertz?
100
The idea of arranging the elements in the periodic table according to their chemical and physical properties is attributed to this scientist.
Who was Mendeleev?
100
This describes the mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together
What is a chemical bond?
200
Which branch of science focuses on the study of substances containing carbon?
What is organic chemistry?
200
This scientist first recognized that the ratio of the number of atoms that combine is the same as the ratio of the masses that combine?
Who was John Dalton?
200
A quantum of electromagnetic energy is called this.
What is a photon?
200
This is the way elements are ordered in the modern periodic table.
What is increasing atomic number?
200
What type of bond is formed when two atoms share electrons?
What is a covalent bond?
300
These two features distinguish matter.
What is mass and volume?
300
John Dalton's atomic theory did not explain this law.
What is the conservation of energy?
300
If electrons in an atom have the lowest possible energies, the atoms is in this.
What is the ground state?
300
What are the names of the horizontal rows of blocks in the periodic table?
What are periods?
300
To indicate resonance, a _________ is placed between a molecule's resonance structures.
What is a double-headed arrow?
400
What type of change occurs when a leaf changes color?
What is a chemical change?
400
In a glass tube, electrical current passes from the negative electrode, called _________ , to the other electrode.
What is the cathode?
400
This is the part of the atom where electrons CANNOT be found.
What is the nucleus?
400
These metals occur as compounds in nature.
What are the alkali metals?
400
The ions in an ionic compound are organized into this kind of a structure.
What is a crystal structure?
500
The state of matter in which a material has a definite volume but no definite shape.
What is the liquid state?
500
Protons within a nucleus are attracted to each other by these.
What are nuclear forces?
500
This is the shape of the p orbitals.
What are dumbbells?
500
As you move down the periodic table from carbon through lead, atomic radii will
What is generally increase?
500
In the NaCl crystal, each Na+ and Cl- ion has clustered around it _____ of the oppositely charged ions.
What is 6?
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