Chemistry
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ACROSS
1. The primary difference between a gas and a liquid is the _____ between molecules.
6. The study of matter and of the transformations it can undergo.
8. A type of mixture in which the components can be seen as individual substances.
12. The state of a material that consists of only a single element or compound.
13. A homogeneous mixture in which different components are of different phases.
16. A notation that uses symbols and subscripts to denote the composition of an element or compound.
18. His law states that the product of pressure and volume for a given mass of gas is constant as long as the temperature doesn't change.
20. An atomic _____ is the region of space where electrons of a given energy are likely to be located.
21. The atomic _____ designates the identity of an element, which is the number of protons in the nucleus of an atom.
22. A homogeneous mixture in which all components are of the same phase.
23. Chemical _____ . Synonymous with chemical change.
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2. The state of a material that consists of more than one element or coupound.
3. The core of an atom, conssiting of two basic subatomic particles.
4. A fundamental material consisting of only one type of atom.
5. Phase of matter in which molecules fill whatever space is available to them, taking neither definite shape nor definite volume.
7. Two (or more) atoms whose nuclei contain the same number of protons but different number of neutrons.
9. A type of mixture composed of components so finely mixed that composition is the same through the mixture.
10. The electrically neutral particles in an atomic nucleus.
11. The atomic ____ number is the same as the number of protons plus neutrons in a nucleus.
12. The positively charged particles in an atomic nucleus.
13. An atomic _____ is an abbreviation for an element.
14. Phase of matter characterized by definite volume and shape.
15. The negatively charged particles in an atom.
17. During this type of change atoms are rearranged to give a new substance.
19. Phase of matter characterized by definite volume but no definite shape.

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