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Chemistry, 02.10.2019 21:00 Hakika

Based on dalton's atomic theory, which of the following is true about all atoms of the same element?
a. they have different masses
b. they have the same properties.
c. they can be divided into molecules.
d. they are composed of visible matter.

2. which of the following is a compound?
a. ne
b. n2
c. naci
d. o2

3.which of the following indicates that an endothermic reaction has occurred?
a. heat is released
b. water is formed
c. salt is produced
d. temperature decreases

4. what is a homogeneous mixture called when microscopically insoluble particles are suspended throughout another substance?
a. colloid
b. compound
c. emulsion
d. solution

5. which particle moves around the nucleus?
a. electron
b. molecule
c. neutron
d. proton

6. two different sub-atomic particles are described below:

particle x: no charge
particle y: outside the nucleus

which statement is true?
a. x is a neutron and y is an electron
b. x is a neutron and y is a proton
c. x is a proton and y is an electron
d. x is an electron and y is a proton.

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