What determines the order of placement of the elements on the modern Periodic Table?

1. atomic number

2. atomic mass

3. the number of neutrons, only

4. the number of neutrons and protons

The chemical equation for reduction of phosphorite Ca3 (PO4) 2

Which statement best describes the shape and volume of an aluminum cylinder at STP? (1) It has a definite shape and a definite volume. (2) It has a definite shape and no definite volume. (3) It has no definite shape and a definite volume.

Which is an example of a chemical change? mixing of poster colors formation of clouds metal corroding in salt water sugar dissolving in water separating salt from seawater

What is the relationship between metallic character and ionization energy

If the experimental value for the percentage of O is 37%, The accepted value of the percentage of Oxygen is 40%, what is the error in the experiment? 6.5%08.1% 7.5% 5%

100 level student of the adamawa state university mubi was ask to synthesize ammonia (haber process) in the ratio 3:1 of hydrogen to nitrogen. durin the synthesize, 6.00 mole of nitrogen, 4.20 mole of hydrogen and 0.

Na + leaks through neuron membranes faster than k + because of the properties of the non-gated leak channels. na + leaks through neuron membranes faster than k + because of the properties of the non-gated leak channels. a. True b. False

How many protons does one atom of sulfur have

Which shows the electron configuration for zinc (Zn) ? [Kr]5s24d10 [Kr]5s24d6 [Ar]4s23d9 [Ar]4s23d10

What is the oxidation number of chromium in the ionic compound ammonium dichromate (nh4) 2cr2o7?