Question

name kimberly lemos p5
date
clay math
crossword puzzle: chemistry
across

1. the subatomic particle of an atom that has a negative charge is called a(n) ____.
2. a chemical ____ occurs when 2 or more molecules interact with each other causing the molecules to change.
3. the 4 fundamental states of matter are: solid, liquid, gas and ____.
4. the subatomic particle of an atom that does not have an electric charge is called a(n) ____.
5. the ____ gases are found in group 18 of the periodic table, the last column on the right (helium, neon, argon, krypton, xenon & radon).
6. the amount of matter in a object
7. organic chemistry is the branch of chemistry that deals with compounds containing ____.

down

1. how many hydrogen atoms are in a molecule of water?
2. the positively charged subatomic particle in the nucleus of an atom is called a(n) ____.
3. the chemical element with atomic number 1. its the first element in the periodic table.
4. the ____ table is a tabular arrangement of the elements.
5. a type of material that is considered a good conductor of electricity and heat
6. the central core of the atom containing protons and neutrons
7. the atomic ____ is the number of protons in an atom.
8. a charged atom or molecule (the number of electrons is not equal to the number of protons)

Explanation:

1. The sub - atomic particle with a negative charge is an electron.
2. A water molecule ($H_2O$) has 2 hydrogen atoms.
3. The positively charged sub - atomic particle in the nucleus is a proton.
4. The chemical element with atomic number 1 is hydrogen.
5. When 2 or more molecules interact and change, it's a chemical reaction.
6. The 4 fundamental states of matter are solid, liquid, gas and plasma. The tabular arrangement of elements is the periodic table.
7. Metals are good conductors of electricity and heat.
8. The central core of the atom with protons and neutrons is the nucleus.
9. The sub - atomic particle without an electric charge is a neutron.
10. The number of protons in an atom is the atomic number.
11. The noble gases are in group 18 of the periodic table.
12. A charged atom or molecule is an ion.
13. The amount of matter in an object is mass.
14. Organic chemistry deals with compounds containing carbon.

Answer:

Across:

1. Electron
2. Reaction
3. Plasma
4. Neutron
5. Noble
6. Mass
7. Carbon

Down:

1. Two
2. Proton
3. Hydrogen
4. Periodic
5. Metal
6. Nucleus
7. Number
8. Ion