Part of a periodic table is shown. Elements in Periods 1 Through 5 1 2 3 4 6 7 | 8 | 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | 24 | 25 | 26 | 27 | 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 In which numbered position would a Period 4 element that is a metal with three valence electrons be located?​

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

the link still does not work even when adding it to the url bar

explanation:

the ratio of the conjugate base to the acid required to attain the desired ph.