1. The three particles that make up an atom are A. protons, neutrons, and isotopes B. neutrons, isotopes and electrons C. positives, negatives, and electrons D. protons, neutrons, and electrons

2. The space surrounding the nucleus of an atom contains protons neutrons electrons ions

3. The nucleus is made up of protons and electrons electrons and neutrons protons and neutrons protons, neutrons, and electrons

4. An atom of Magnesium has 12 protons and 12 neutrons in its nucleus. If the atom is neutral, how many electrons does it have? 24 12 6

5. Matter is NOT described by which of the following characteristics? Is always visible Has mass Makes up living and non-living things Takes up space

6. Polymers made of sugars and are a source of energy are called _______? Nucleic Acids Proteins Lipids Carbohydrates

7. What type of electron is available to form bonds? Valence Paired Inner Covalent

8. Which of the following can be determined from utilizing the Atomic Mass? Number of protons Number of neutrons Number of electrons Atomic Number

9. A certain atom of Nitrogen contains 7 protons, 7 neutrons, and 7 electrons. Another atom of unknown identity contains 9 protons. Which of the following MUST be true about this unidentified atom? It has 9 neutrons in its nucleus It cannot be an atom of Nitrogen It is an isotope of Nitrogen Its atomic mass is 23.

10. What type of bond is illustrated by the diagram below? Ionic Bond Organic Bond Double Bond Covalent Bond

11. How are ionic and covalent bonds alike? They both form organic molecules. They both transfer protons. They both transfer electrons. They both fill outer electron shells.

12. When hydrogen reacts chemically with fluorine, the electron from hydrogen will transfer to which numbered area in the diagram? 1 2 3 4

13. If an atom contains 11 protons and 12 neutrons, its atomic number is 1 11 12 23

14. The following picture illustrates what type of bond? Covalent Ionic Hydrogen Magnetic

15. Isotopes are atoms of the same element with the same number of protons and a different number of electrons a different number of molecules the same number of neutrons a different number of neutrons

16. Using the Lewis dot diagram below, correctly identify the element and its number of valence electrons. Chlorine, 4 Calcium, 6 Carbon, 4 Carbon, 6

17. Magnesium fluoride is a chemical compound that has several uses. Each molecule of magnesium fluoride contains one atom of magnesium and two atoms of fluorine. Which of the following correctly represents its chemical formula? MgFl MgFl2 Mg2F MgF2

18. Using the definition of the prefix a-,an-, which of the following terms means to be without sensation? Abnormal Acknowledge Apathy Anesthesia

19. An atom of Beryllium has 2 valence electrons. What will an atom of Beryllium MOST likely do to be stable? Gain 1 electron Gain 2 electrons Lose 2 electrons Lose 1 electron

20. Proteins that speed up chemical reactions by lowering the activation energy are referred to as? Peptides B. Carbohydrates C. Enzymes D. Substrates

21. Which property of water results in causes water to move upward against gravity? Cohesion High Specific Heat Polarity Adhesion

22. A solution with a pH of 9 will be classified as a ? Strong acid Base Weak acid neutral

23. When is an element usually the LEAST reactive? When it has less than 8 electrons in its outer electron energy level When it has 2 electrons in its inner electron energy level. When it has more than 8 electrons in its outer electron energy level When it has exactly 8 electrons in its outer electron energy level

24. Write the electron configuration AND Lewis Dot Structure for

25. Using the symbols and Lewis Dot Structures, show how the elements of the compound NH3 would bond together.