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WorksheetsNGSS.MS-PS1-1
Total questions: 20
Worksheet time: 16mins
How many protons does fluorine have?
19
1
9
10
In an atom, the number of protons is equal to the number of ____________.
energy levels
neutrons
neurons
electrons
The atoms of a certain element each contain 9 protons and 7 valence electrons. Which statement correctly identifies this element and describes the chemical reactivity?
The element is oxygen, and is highly reactive.
The element is fluorine, and is highly reactive.
The element is oxygen, and is not very reactive.
The element is fluorine, and is not very reactive.
How many F atoms are in this compound?
MgF2
2
6
8
12
This is what holds atoms in a molecule and compound together. They can be ionic, covalent, or metallic (and you'll learn about these in high school chemistry).
chemical bond
chemical formula
chemical symbol
electron cloud
What is the atomic mass?
58.693
28
59
Which statement accurately describes the atoms of a specific element?
An indium (In) atom contains 115 protons inside the nucleus and 49 neturons outside the nucleus.
A Scandium (Sc) atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus.
An aluminum (Al) atom contains 27 electrons and 27 protons inside the nucleus.
A zinc (Zn) atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus.
Where are electrons located in an element?
nucleus
cloud energy levels
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