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mass of protons + mass of neutrons
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∙ 11y ago
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Matter is anything?
Matter is anything made off atoms (basically every object that exists).
What is helium made up off?
Atoms of Helium !
What makes up the visible mass of the universe?
Matter is made of atoms, vast collections of atoms. Differences in matter are due to different amounts of protons and neutrons in the atom. Elements are distinguished by the number of protons, whereas isotopes (same element but different mass) are determined by the number of neutrons.
What is difference beteeen mass and volume?
Mass is volume multiplied by the density. Volume is the amount of physical space an item takes up. The mass is the amount of atoms that are packed into that space. NOTE: Mass is NOT the same a weight. Weight changes based on gravity. Without taking atoms off/out or adding them in to the same space mass will never change.
What 2 things does mass measure?
On Earth mass measures the gravitational pull an object has. Any place off Earth or with a unequal gravitational pull mass is measured in the amount of atoms an object has.
Why does stars start off as dust and gas?
because they were made from hot atoms
Are stars made of cells?
No. Standard sized young Stars are made up of hydrogen atoms fusing themselves into helium atoms and giving off lots of Energy.
Who made the discovery that radium atoms give off energy changed the scientific view of atoms and matter in the universe?
Marie Curie
Who made the discovery that radium atoms gave off energy changed the scientific view of atoms and matter in the universe?
Marie Curie
Is the total mass after fusion greater or less than before fusion?
The total mass is less after a fusion reaction. Some of the mass is converted into energy and given off due to the nuclear fusion reaction. For example. 2 atoms of hydrogen are fused to become 1 atom of helium. However, the helium atom will have less mass than the combined mass of the 2 original hydrogen atoms. The excess mass is lost via the energy given off from the nuclear fusion reaction.
What groups of atoms give off the most energy when they gain electrons?
Group 17, halogens
What caused the sun to give off heat and light?
The sun converts hydrogen into helium in the core of the sun. This neuclear reaction of four hydrogen atoms into one helium atom creates heat and light (kinetic energy) as result of the loss of mass (1 helium atom has less mass than 4 hydrogen atoms and the loss of mass is the heat and light)Plasma fusion
