Which of the following is a variable property for a gas ? Select all that apply.
2 answers:
C) volume
.........
The volume of gas depends on e.g. temperature and pressure.
The correct answer is volume and shape.
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A. Cesium because reactivity of alkali metals increases from the top to the bottom of the group.
Answer:
oxygen
Explanation:
The given isotope has 8 protons and 8 electrons, so the atomic number of the given isotope is 8, which is the atomic number of oxygen.
D. 1-butyne.
The name of this molecule is 1-butyne.
A fossilized fish could be used to identify the date of of the rock layer.
Answer:
Atoms
Explanation:
Elements are the chemical combinations of two or more atoms of the same kind
