Science Summative - Atoms
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What is a unit cell in a crystal lattice?
The smallest building block of a crystal and the repeating block of a crystal
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What is a crystal lattice?
The overall shape or structure of a crystal
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What are columns called in the periodic table?
Groups or families
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What are rows called in the periodic table?
Periods
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How are elements arranged in the periodic table?
in order of increasing atomic number
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How are elements placed in groups in the periodic table?
Based on the number of valence electrons.
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How can you tell the number of electrons in any atom?
The atomic number
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How can you tell the number of valence electrons in any atom?
It is the atoms main group number. Ex: Oxygen is in group 16, it has 6 valence electrons. Calcium is in group 2, it has 2 valence electrons.
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Which subatomic particles make up an atomās mass?
Protons and Neutrons
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What are the two main ways how atoms chemically bond?
Ionically and Covalently
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Covaliant bond
When only non-metals share electrons
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Ionic bond
When metals and non-metals transfer electrons
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Why do atoms chemically bond?
To have a full outer shell, or to be stable
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Which subatomic particle is responsible for chemical bonding?
Electrons
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Where are protons located?
The nucleus
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Where are neutrons located?
The Nucleus
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Where are electrons located?
The electron cloud
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Why are elements in groups 18 non-reactive?
They all have full outer shells
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What are the three subatomic particles that make up an atom?
Protons, neutrons, and electrons
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What charge does a proton have?
Positive
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What charge does a neutron have?
No charge
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What charge does an electron have?
Negative
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What is the mass of a proton?
1 amu (atomic mass unit)
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What is the mass of a neutron?
1 amu (atomic mass unit)
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What is the mass of a electron?
0 amu (atomic mass unit)
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How does the term āopposites attractā apply to ionic bonding?
Atoms give away electrons in ionic bonding. One atom becomes positive (more protons) and the other negative (more electrons). The opposites need to attract to complete the compound.
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What does the dark staircase line do?
Separates metals from non-metals
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Where are metals located on the periodic table?
On the left
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Where are non-metals located on the periodic table?
On the right
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What is the ratio of apples to oranges?
6:3
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What is the ratio of pears to apples and oranges?
3:9
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How many valence electrons are in this atom represented by a bohr model?
4
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How many protons are in this atom represented by a bohr model?
14
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What is the arrow pointing to?
The atomic number
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What is the arrow pointing to?
The element symbol
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What is the arrow pointing to?
The element name
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What is the arrow pointing to?
The atomic mass
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What kind of bond is this?
A single bond
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What kind of bond is this?
A double bond
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What kind of bond is this?
A triple bond
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What kind of chemical bond is this?
Ionic
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What kind of chemical bond is this?
Covalent
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How many valence electrons are in the elements shown by this dot diagram?
3
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How many valence electrons are in the elements shown by this dot diagram?
6
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