Download Elements and Atoms study guide Ch. 9.2 1. atom – the smallest

Elements and Atoms study guide Ch. 9.2
1. atom – the smallest particle of an element that has the same chemical properties as the element
2. proton – the positively charged particle inside an atom’s nucleus
3. neutron – a particle with no charge located inside an atom’s nucleus
4. electron – a negatively charged particle that moves around an atom’s nucleus
5. element – a substance that cannot be broken down further into anything simpler
6. nucleus – the densest part of an atom where most of its mass is located
7. atomic number – the number of protons in the atom of an element
8. metal – an element that conducts electricity
9. transparent – property of matter that allows light to pass through
10. electrically neutral atom – has equal number of protons and electrons
11. periodic table – chart of elements arranged by the atomic number
a. vertical columns indicate elements that react in similar ways, chemically alike
b. horizontal rows are called periods
12. matter – made up of elements in 3 states; liquid, solid, and gas
13. atomic theory – John Dalton concluded that gases are made up of solid particles that can be
compressed together
14. physical change – a change in size, shape, or state without forming a new substance
15. chemical change – a change in matter that produces a new substance with different properties than
the original
16. Scientists draw conclusions based on observation and experimentation
Elements and Atoms study guide Ch. 9.2
1. atom – the smallest particle of an element that has the same chemical properties as the element
2. proton – the positively charged particle inside an atom’s nucleus
3. neutron – a particle with no charge located inside an atom’s nucleus
4. electron – a negatively charged particle that moves around an atom’s nucleus
5. element – a substance that cannot be broken down further into anything simpler
6. nucleus – the densest part of an atom where most of its mass is located
7. atomic number – the number of protons in the atom of an element
8. metal – an element that conducts electricity
9. transparent – property of matter that allows light to pass through
10. electrically neutral atom – has equal number of protons and electrons
11. periodic table – chart of elements arranged by the atomic number
a. vertical columns indicate elements that react in similar ways, chemically alike
b. horizontal rows are called periods
12. matter – made up of elements in 3 states; liquid, solid, and gas
13. atomic theory – John Dalton concluded that gases are made up of solid particles that can be
compressed together
14. physical change – a change in size, shape, or state without forming a new substance
15. chemical change – a change in matter that produces a new substance with different properties than
the original
16. Scientists draw conclusions based on observation and experimentation