https://padlet.com/nguyebao023/bqw34r1r5m39 Metals, Metalloids, Nonmetals en-us 2018-04-26 18:00:55 UTC 2018-04-27 17:15:49 UTC hello@padlet.com nguyebao023 https://padlet.com/nguyebao023/bqw34r1r5m39/wish/255776154 Metals are ductile and malleable, meaning that they can be easily hammered flat without breaking and pulled into wires. They have luster, meaning they are shiny. They are solid at room temperature. All metals are good conductors.

]]> 2018-04-26 18:07:33 UTC https://padlet.com/nguyebao023/bqw34r1r5m39/wish/255776154 nguyebao023 https://padlet.com/nguyebao023/bqw34r1r5m39/wish/255779721 Some metalloids are called semiconductors. They have some properties of metals and some properties of non-metals]]> 2018-04-26 18:15:28 UTC https://padlet.com/nguyebao023/bqw34r1r5m39/wish/255779721 nguyebao023 https://padlet.com/nguyebao023/bqw34r1r5m39/wish/255781499 Non metals are almost the opposite of metals. A lot of non-metals are gases at room temperature. They are poor conductors and don't have luster]]> 2018-04-26 18:19:01 UTC https://padlet.com/nguyebao023/bqw34r1r5m39/wish/255781499 nguyebao023 https://padlet.com/nguyebao023/bqw34r1r5m39/wish/255784088 Titanium is a metal because it is lustrous, a good conductor, and is malleable. It looks shiny and silvery.
It is useful because it is as strong as some steels and is 45% lighter. It also resists corrosion and it has highest strength-to-weight ratio of any metal. ]]> 2018-04-26 18:23:37 UTC https://padlet.com/nguyebao023/bqw34r1r5m39/wish/255784088 nguyebao023 https://padlet.com/nguyebao023/bqw34r1r5m39/wish/256091320 Silicon is a metalloid because it has luster, but is a semiconductor. It looks like some kinds of obsidian. It is used to make computer chips and related hardware. It is also used in high-tech devices]]> 2018-04-27 16:53:42 UTC https://padlet.com/nguyebao023/bqw34r1r5m39/wish/256091320 nguyebao023 https://padlet.com/nguyebao023/bqw34r1r5m39/wish/256097438 Helium is a non-metal because it is a gas at room temperature. It looks like air. Helium is used to inflate blimps, scientific balloons, and party balloons. It is used as an inert shield for arc welding, to pressurize the fuel tanks of liquid fueled rockets and in supersonic windtunnels.

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