Which scientist proposed the model of an atom as a nucleus surrounded by electrons?

James Chadwick

John Dalton

J. J. Thompson

Ernest Rutherford

What is the minimum mass of ice at 0.0 C that must be added to 1.00 kg of water to cool the water from 28.0 C to 12.0 C? (Heat of fusion = 333 J/g; specific heat capacities: ice = 2.06 J/gK, liquid water = 4.184 J/gK)

true or false: 1. An object can have only one type of energy at a time 2. If an object has energy, it must be moving. 3. All energy travels in waves.

What is the correct name for the compound nh4clo4?

Which group on the periodic table contains only metals? A. the second group B. Along the top C. Along the bottom D. The last group

What is the term for heat transfer because of the movement of a gas?

If a compound has a molar mass of 180 g/mol and its empirical formula is CH20, what is its molecular formula? CH20 C₂H4O2 C6H1206 C12H22011

Which element has six energy levels? A) rubidium (Rb) B) cesium (Cs) C) potassium (K) D) sodium (Na)

What is a segment of dna that contains a single unit of information?

Is carbon monoxide covalent or ionic?

Do all organisms perform meiosis?