Key Concept Video: Subatomic Particles and lsotope symbols First, launch the vid

Question

Key Concept Video: Subatomic Particles and lsotope symbols First, launch the video below. During the video, you'll be asked a conceptual question about the key concept. After watching the video, answer the related question at the right. You can watch the video again at any point to review. PEARSON ALWAYS LEARNING Subalomc Parodies and sotope Symbols Subotomic Partides and kotope Symbols Subotonic Portides Protons Neutrons e previous l 9 of 25 l ned Part A Identify the atom whose nucleus is composed of56 protons and 82 neutrons. O Lead-82 O Barium-82 O Barium-138 O Lead-138 My Answers Ghet Continue

Explanation / Answer

Part A) Nucleus with 56 protons and 82 neutrons is,

Barium-138

Oil Droplet

Part A) the type of force acting on an oil droplet,

Buoyant forces

Electric force

Part B) Effect of field on negatively charged oil droplet,

In the presence of electric field, the negatively charged oil droplet moves freely towards the negatively charged plate

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