Question 1 Which of the following properties uniquely identifies every element?

Number of valence electrons

Phase at room temperature

Number of protons

Charge of the atom

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.

What is the scientific name for weight?