http://www.sciencekids.co.nz/sciencefacts/chemistry/hydrogen.html

At room temperature and under standard pressure conditions, hydrogen is a gas ... as liquid hydrogen takes up less space than hydrogen in its normal gas form.

https://education.jlab.org/itselemental/ele001.html

The Element Hydrogen - Basic Physical and Historical Information. ... Phase at Room Temperature: Gas. Element Classification: Non-metal. Period Number: 1 ...

http://www.rsc.org/periodic-table/element/1/hydrogen

Element Hydrogen (H), Group 1, Atomic Number 1, s-block, Mass 1.008. Sources, facts, uses ... atomic mass, 1.008. State at 20°C, Gas, Key isotopes, 1H, 2H.

https://en.wikipedia.org/wiki/Hydrogen

Hydrogen is the chemical element with the symbol H and atomic number 1. With a standard ... Non-remnant stars are mainly composed of hydrogen in the plasma state. .... Hydrogen can react spontaneously and violently at room temperature with chlorine and fluorine to form the corresponding hydrogen halides, hydrogen  ...

http://pt.chemicalstore.com/H%20-%20Hydrogen.htm

Normal hydrogen at room temperature contains 25% of the para form and 75% of the ortho form. The ortho form cannot be prepared in the pure state. Since the ...

https://socratic.org/questions/is-hydrogen-a-solid-liquid-or-gas-at-room-temperature

Jun 6, 2018 ... To get hydrogen to the liquid state, the temperature must be below its critical temperature of 33 K or −240.15∘C and must be at a minimum ...

https://www.quora.com/What-is-hydrogens-state-of-matter-at-room-temperature-How-is-it-determined

At STP, Standard Temperature and Pressure, hydrogen is a gas. A gas has no definite shape and expands to fill the volume available to it.

https://www.worldofmolecules.com/elements/hydrogen.htm

At standard temperature and pressure it is a colorless, odorless, non-metallic, ... main sequence are overwhelmingly composed of hydrogen in its plasma state.

https://www.ducksters.com/science/chemistry/hydrogen.php

Kids learn about the element hydrogen and its chemistry including atomic weight, ... Nonmetal; Phase at Room Temperature: Gas; Density: 0.08988 g/L @ 0°C ...

https://chemed.chem.purdue.edu/genchem/topicreview/bp/ch10/hydrogen.php

As a result, hydrogen can have three oxidation states, corresponding to the H+ ... Finally, the element is a gas at room temperature and atmospheric pressure, ...