2. Atoms & Elements

In which part of the Earth is phosphorus primarily found?

Which observation provides evidence that mercury has a partially molten (liquid) state at room temperature?

How many electrons are present in a neutral atom of elemental sodium (Na)?

Which subatomic particle is found in the nucleus of an atom and has a positive charge?

Which of the following is the basic unit of matter and is the smallest particle of an element that retains its chemical properties?

How many protons are in an atom of lithium?

Which one of the following is the smallest unit of matter that has all the properties of an element?

Which of the following is closest to the diameter of a proton (in nanometers)?

Which of the following is the number of protons in a neutral atom of tin (Sn)?

How many protons are present in an atom of tellurium (Te)?

How many electrons are present in a neutral lithium atom?

How many protons are present in an atom of oxygen?

How many atoms are present in a molecule of hydrogen (H_2)?

Which subatomic particles move rapidly around the nucleus of an atom?

Which element has a neutral atom containing 17 electrons?