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WorksheetsNGSS.MS-PS1-1
Total questions: 20
Worksheet time: 32mins
When a covalent bond forms _______________ are shared.
protons
nutrons
valence electrons
quarks
Which of the following is the most accurate statement?
everything is both a molecule and a compound
nothing can be both a molecule and a compound
all compounds are also molecules
All molecules are also compounds
Salt (NaCl)
Compound
Element
Mixture
What is the correct formula for a compound formed from Na + and S -2
Na2S
NaS2
Na2S2
NaS
When a molecule is made up of more than two different elements ( Example CO2) we call this .......................
a mixture
atom
a compound
What is the atomic number of oxygen?
5
Sandwich
8
17
What does c represent?
Proton
Neutron
Electron
What is the smallest unit of matter? It is composed of protons and neutrons, held together in the nucleus, and electrons around the nucleus in different electron orbitals, which form an electron cloud.
cell
nucleus
atom
electron
What is the atomic mass?
58.693
28
59
Molly makes a model of an atom, showing the protons, neutrons, and electrons. What field of science does she work in?
Biology
Geology
Physics
HCl is a(n) _____________.
molecule
compound
element
molecule and a compound
How many phosphorus atoms are there?
0
1
3
4
Calculate the number of Oxygen atoms in Al(OH)3
1
2
3
4
Which statement is true about the diagram above?
The samples all have the same properties.
The samples all have different properties.
Sample 1 and 3 have the same properties.
Sample 2 and 3 have the same properties.
Atoms of which two elements are represented by these two models?
Oxygen, O, and Neon, Ne
Fluorine, F, and Neon, Ne
Silicon, Si, and Phosphorous, P
Beryllium, Be, and Boron, B
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