Question

Which option is correct? Do not need explanations! Just answers to check my work.

1)
a - Mixtures are classified as "element" or "compound"
b - Solid substance fills the available volume and forms according to the container / environment.
c - Pure compounds consist of only one type of element or only of one type of compound.
d - Liquid has a given volume and a given shape (will not be shaped after the container).
e - In a heterogeneous mixture, the composition is the same throughout.
2)
The lowest possible temperature is the temperature at which substance has no kinetic energy (no movement). Which temperatures in K and ° C represent the lowest possible temperature?
a. The temperature scale in ° C does not go to such low temperatures.
b. -273 K, 0 °C
c. 0 K, -273 °C
d. 0 K, 0 °C
e. -273 K, -273 °C
3)
Which of the following combinations of element and number of valence electron and nuclear electron is wrong?
a. Aluminum, Al; 3 valence electrons; 10 nuclear electrons.
b. Lithium, Li; 1 valence electron; 2 nuclear electrons.
c. Calcium, Ca; 2 valence electrons; 18 nuclear electrons.
d. Chlorine, Cl; 7 valence electron; 10 nuclear electrons.
e. Fluorine, F; 7 valence electron; 1 nuclear electron.

Answer 1

The questions cover mixtures, lowest possible temperature, and elements' valence electrons and nuclear electrons. The correct options are b, c, and the wrong combination is e.

Step-by-step explanation:

Question 1:

The correct option is b. A solid substance fills the available volume and forms according to the container or environment.

Question 2:

The correct answer is c. 0 K, -273 °C. The temperature scale in °C does not go to such low temperatures, but the Kelvin scale does.

Question 3:

The wrong combination is e. Fluorine, F; 7 valence electrons; 1 nuclear electron. Fluorine should have 7 nuclear electrons, not 1.

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