UNIT 2_ATOMS&PERIODIC TABLE

Edit Answers

5. The repeating pattern of chemical and physical properties of the elements.
6. The central part of an atom, containing protons and neutrons.
7. The method of organizing elements based on shared characteristics.
10. A series of 15 metallic elements from actinium to lawrencium on the periodic table.
14. Highly reactive nonmetals in Group 17 of the periodic table.
15. Elements with properties between those of metals and nonmetals.
17. Elements in Groups 3-12 of the periodic table, known for their ability to form various oxidation states.
20. A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.
21. An element that is typically shiny, malleable, and conducts electricity well.
22. The basic unit of a chemical element.
25. The number of protons in the nucleus of an atom, determining its chemical properties.
26. A subatomic particle found in the nucleus of an atom, with no electric charge.
28. Atoms of the same element with different numbers of neutrons.
30. Elements in Group 2 of the periodic table, known for being shiny and reactive.
33. An outer shell electron that can participate in chemical bonding.
35. Patterns in the periodic table that show the change in properties of elements.
36. An atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
37. The systematic arrangement of elements based on their properties.

1. A vertical column in the periodic table that contains elements with similar properties.
2. The distance from the nucleus of an atom to the outer boundary of the electron cloud.
3. Characteristics used to describe an element's behavior and reactions.
4. A measure of an atom's ability to attract and hold electrons.
8. The fixed energy that an electron can have within an atom.
9. Elements in Group 18 of the periodic table, known for being inert and non-reactive.
11. A series of 15 metallic elements from lanthanum to lutetium in the periodic table.
12. The law that states that the properties of elements are periodic functions of their atomic numbers.
13. A substance that cannot be broken down into simpler substances by chemical means.
16. The distribution of electrons in an atom's orbitals.
18. Elements that are typically not shiny, malleable, or conductive.
19. A negatively charged subatomic particle found outside the nucleus.
23. The scientist who created the first widely recognized periodic table.
24. A horizontal row in the periodic table.
27. The state of being alike in properties or characteristics.
29. A positively charged subatomic particle found in the nucleus of an atom.
31. Highly reactive metals in Group 1 of the periodic table, such as sodium and potassium.
32. The mass of an atom, typically measured in atomic mass units (amu).
34. How readily an element or compound undergoes a chemical reaction.