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Chemistry Quiz 21 (25 MCQs)

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1. An atom that has a positive or negative charge.
2. The following are the physical properties of Graphene except
3. Air is an example of _____
4. Covalent bonds are bonds between atoms that:
5. When a metal changes color because it has been heated a _____ change has occured
6. What is the mass number and name of an element with 8 protons and 8 neutrons?
7. Subatomic particle that determines the identity of the atom
8. A covalent bond forms when
9. Which of the following is not a physical state of matter?
10. Form of matter that has a definite shape (does not depend on the container) and volume.
11. Who discovered the subatomic particle "electron" ?
12. Determine whether each material below is a pure substance-element, pure substance-compound, a homogeneous mixture, or a heterogeneous mixture.C 2H 2
13. Calculate the formula mass of $ KCl$ . (Atomic mass of $ K=39$, $ Cl=35.5$ )
14. A solution is a.
15. Which state of matter has the highest amount of kinetic energy?
16. What are two parts that make up a solution?
17. Alchemists _____
18. What is the symbol of Tin
19. Ionic bonds are the attraction between
20. Which is a tertiary halogenoalkane?
21. Pounds = _____ kg
22. Why can metals conduct electricity?
23. An ion with a negative charge.
24. What is the simplest form of matter that retains an elements chemical identity?
25. How many sig figs are there? 100.00
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