You try: Protons. Electrons. Neutrons + + Name: Date: Period:

Transcription

1 Atoms & Elements

2 Name: Date: Period: Atoms are the basic units of. They have 3 parts -,, &. Atoms are because they have the same number of () and (-) Protons charged particles that sit in the. The number of protons determines the type of and the. Electrons Neutrons particles that are in the nucleus and have no. All atoms, except, have and in their nucleus. charged particles that sit in the electron shells or. The first shell can hold electrons and the second and third shells can hold electrons. You try: If the number of protons determines the element, what element does this atom represent?

3 Name: Date: Period: A substance that cannot be into simpler substances by means. An element is composed of that have the same, that is, each atom has the same number of in its. Every element has a unique. It indicates the total of in the of the atom. Normal atoms are, so it is also the number of. Atomic Number Element Name Every element has its own unique name. Many element names are very. Like, many are based on other languages. is named after khloros, the Greek word for greenish yellow. New names are approved by an. 12 Mg Magnesium Every element is using a unique of one or two letters. The first letter is always and if there is a second letter, it is. Some are based on other languages Fe is, from the Latin ferrium. Chemical Symbol Atomic Mass Atomic mass is the mass of and in an atom. are so small, they do not add to the mass. The mass is a because it is an average of the, which are atoms of the that have more or less. You try: What element s neutral atom has 17 electrons? How many neutrons are in a lithium atom?

4 Name: Date: Period: - Protons - - Electrons Neutrons You try: If the number of protons determines the element, what element does this atom represent?

5 Name: Date: Period: Atomic Number 12 Element Name Mg Magnesium Chemical Symbol Atomic Mass You try: What element s neutral atom has 17 electrons? How many neutrons are in a lithium atom?

6 Teacher Key Name: Date: Period: Atoms are the basic units of. matter They have 3 parts -, protons, neutrons &. electrons Atoms are neutral because they have the same number of protons () and electrons (-) Protons Positively charged particles that sit in the. nucleus The number of protons determines the type of element and the Atomic. Number Neutrons Neutral particles that are in the nucleus and have no. charge All atoms, except, hydrogen have neutrons and protons in their nucleus. Electrons Negatively charged particles that sit in the electron shells or energy. levels The first shell can hold two electrons and the second and third shells can hold eight electrons. You try: If the number of protons determines the element, what element does this atom represent? 3 Protons = Lithium

7 Teacher Key Name: Date: Period: A substance that cannot be broken down into simpler substances by chemical means. An element is composed of atoms that have the same Atomic, Number that is, each atom has the same number of protons in its. nucleus Every element has a unique Atomic. Number It indicates the total number of protons in the nucleus of the atom. Normal atoms are, neutral so it is also the number of. electrons Atomic Number Element Name Every element has its own unique name. Many element names are very. old Like Chemical, Symbols many are based on other languages. Chlorine is named after khloros, the Greek word for greenish yellow. New names are approved by an. International Committee You try: 12 What element s neutral atom has 17 electrons? Mg Magnesium Every element is abbreviated using a unique symbol of one or two letters. The first letter is always capitalized and if there is a second letter, it is lower. case Some are based on other languages Fe is, Iron from the Latin ferrium. Chemical Symbol Atomic Mass Atomic mass is the mass of protons and neutrons in an atom. Electrons are so small, they do not add to the mass. The mass is a decimal because it is an average of the, isotopes which are atoms of the elements that have more or less. neutrons How many neutrons are in a lithium atom? 17 - Chlorine Atomic #3 Atomic Mass = 4 Neutrons

8 Lots of room for notes and even additional notes and doodles!

9 Lots of room for notes and even additional notes and doodles!

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