Stemscopes Exam Chemistry Fundamentals 2

Question 1

How are elements arranged on the modern periodic table?

Accepted Answer

By increasing atomic number

Answer

Elements on the modern periodic table are arranged in order of increasing atomic number from left to right.

Question 2

What is a mixture?

Accepted Answer

Two or more substances physically combined

Answer

A mixture consists of two or more substances that are physically combined but not chemically bonded.

Question 3

Which of the following is an example of an exothermic reaction?

Accepted Answer

Burning wood

Answer

Burning wood releases heat and light energy into the surroundings, making it an exothermic reaction.

Question 4

What is the pH of a neutral solution?

Accepted Answer

7

Answer

A neutral solution has a pH of 7, which means the concentration of H⁺ and OH⁻ ions are equal.

Question 5

Which element is represented by the symbol 'Fe' on the periodic table?

Accepted Answer

Iron

Answer

Fe is the chemical symbol for iron, derived from the Latin word 'ferrum.'

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