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Questions and Answers
What is the atomic number of the element with 19 protons?
What is the atomic number of the element with 19 protons?
- 20
- 18
- 21
- 19 (correct)
Which of the following is a property of matter?
Which of the following is a property of matter?
- It does not interact with energy
- It is composed of only one type of atom
- It has mass and occupies space (correct)
- It cannot undergo any physical or chemical changes
Which element is a noble gas at room temperature?
Which element is a noble gas at room temperature?
- Chlorine
- Sodium
- Oxygen
- Neon (correct)
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